Exhibit 99.1

Summary Unaudited Pro Forma Condensed Combined Financial Data

The following summary unaudited pro forma condensed combined financial data has been prepared to reflect the acquisitions of HomeAway and Orbitz by Expedia. On November 4, 2015, Expedia, HomeAway, and Purchaser entered into the Transaction Agreement, pursuant to which Expedia has agreed to acquire HomeAway, including all of its brands. See “—The Pending HomeAway Acquisition”. In addition, the summary unaudited pro forma condensed combined financial data reflects the issuance of the Notes offered hereby.

The unaudited pro forma condensed combined balance sheet combines the historical consolidated balance sheets of Expedia and HomeAway as of September 30, 2015, giving effect to the completion of the HomeAway acquisition and the issuance of the Notes offered hereby as if they had occurred on September 30, 2015. The unaudited pro forma condensed combined statements of operations for the nine months ended September 30, 2015 and year ended December 31, 2014 combine the historical consolidated statements of operations of Expedia, Orbitz and HomeAway for such periods, giving effect to the HomeAway and Orbitz acquisitions and the issuance of the Notes offered hereby as if they had occurred on January 1, 2014. The unaudited pro forma condensed combined statements of operations reflects Orbitz’ results of operations through September 16, 2015, as Orbitz’ results of operations subsequent to Expedia’s September 17, 2015 acquisition of Orbitz are included in Expedia’s results of operations. The unaudited pro forma ratio of earnings to fixed charges combines the historical information of Expedia, Orbitz and HomeAway for the year ended December 31, 2014 and nine months ended September 30, 2015, giving effect to the HomeAway and Orbitz acquisitions and the issuance of the Notes offered hereby as if they had occurred on January 1, 2014. The unaudited pro forma condensed combined financial information does not give effect to the costs of any integration activities or benefits that may result from the realization of future cost savings from operating efficiencies, or any other synergies that may result from the acquisitions, or changes in share price.

The summary unaudited pro forma condensed combined financial information has been prepared for informational purposes only and does not purport to represent what the actual consolidated results of operations or the consolidated financial position of Expedia would have been had the transactions occurred on the dates assumed, nor is this information necessarily indicative of future consolidated results of operations or financial position. The following information has been derived from, and should be read in conjunction with, the unaudited pro forma condensed combined financial statements and the related notes included in this offering memorandum.

The proceeds of this offering are expected to be used, in part, to finance the HomeAway acquisition, but this offering is not conditioned on the consummation of the HomeAway acquisition and we will not be required to redeem the Notes if the HomeAway acquisition does not occur. If the HomeAway acquisition is not consummated for any reason, the net proceeds from this offering will be used for general corporate purposes.

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

Introduction

The following unaudited pro forma condensed combined financial information and related notes present the historical financial statements of Expedia, Orbitz and HomeAway (including their respective subsidiaries) as if the completion of the Orbitz acquisition, the HomeAway acquisition and the issuance of the Notes offered hereby had previously occurred on the dates specified below.

On November 4, 2015, Expedia, HomeAway, and Purchaser entered into the Transaction Agreement, pursuant to which Expedia has agreed to acquire HomeAway, including all of its brands. The transaction has not yet closed. Under the terms of the Transaction Agreement, Expedia is offering to acquire each outstanding share of common stock of HomeAway in exchange for $10.15 in cash and 0.2065 of a share of Expedia common stock (the “transaction consideration”). See “Summary—The Pending HomeAway Acquisition.”

The proceeds of this offering are expected to be used, in part, to finance the HomeAway acquisition, but this offering is not conditioned on the consummation of the HomeAway acquisition and we will not be required to redeem the Notes if the HomeAway acquisition does not occur. If the HomeAway acquisition is not consummated for any reason, the net proceeds from this offering will be used for general corporate purposes.

Previously consummated Orbitz acquisition

On September 17, 2015, Expedia completed its acquisition of Orbitz, including all of its brands, including Orbitz, ebookers, HotelClub, CheapTickets, Orbitz Partner Network and Orbitz for Business, for a total purchase consideration of $1.8 billion. The purchase consideration consisted primarily of $1.4 billion in cash, or $12 per share for all shares of Orbitz common stock outstanding as of the purchase date, as well as the settlement of $432 million of pre-existing Orbitz debt at the closing of the acquisition. Purchase consideration also included $17 million for certain employee restricted stock unit awards of Orbitz, measured at fair value on the acquisition date and vested based on pre-combination service, which were replaced with Expedia restricted stock awards in conjunction with the acquisition.

Pro forma information

The unaudited pro forma condensed combined balance sheet as of September 30, 2015 and the unaudited pro forma condensed combined statements of operations for the nine months ended September 30, 2015 and for the year ended December 31, 2014 are based on (i) historical results of operations of Expedia and its subsidiaries (which include the results of Orbitz subsequent to Expedia’s September 17, 2015 acquisition of Orbitz); (ii) the historical consolidated results of operations of HomeAway; and (iii) and the historical consolidated results of operations of Orbitz for the year ended December 31, 2014 and for the period January 1, 2015 to September 16, 2015 (which were used solely for the preparation of the unaudited pro forma combined condensed statements of operations for the year ended December 31, 2014 and the nine months ended September 30, 2015).

The unaudited pro forma financial information reflects the estimated aggregate consideration of approximately $3.7 billion for the HomeAway acquisition, as calculated below (in thousands, except price per share and exchange ratio):

The unaudited pro forma financial information related to the HomeAway and Orbitz acquisitions was prepared using the acquisition method of accounting and is based on the assumption that the acquisition of HomeAway took place as of September 30, 2015 for purposes of the unaudited pro forma balance sheet and that the acquisitions of both HomeAway and Orbitz took place as of January 1, 2014 for purposes of the unaudited pro forma condensed combined statements of operations. The unaudited pro forma ratio of earnings to fixed charges combines the historical information of Expedia, Orbitz and HomeAway for the year ended December 31, 2014 and nine months ended September 30, 2015, giving effect to the HomeAway and Orbitz acquisitions and the issuance of the Notes offered hereby as if they had occurred on January 1, 2014. In each case, because Orbitz was acquired on September 17, 2015, the results of operations of Orbitz are included in Expedia’s consolidated financial results subsequent to that date.

In accordance with the acquisition method of accounting, the actual consolidated financial statements of Expedia will reflect the HomeAway acquisition only from and after the date of the completion of the acquisition. Expedia has not yet undertaken a detailed analysis of the fair value of HomeAway’s assets and liabilities and will not finalize the purchase price allocation related to the HomeAway acquisition until after the transaction is consummated. The assignment of fair values to certain of Orbitz’ assets and liabilities have not been finalized as of September 30, 2015. Accordingly, the unaudited pro forma adjustments are preliminary and have been made solely for the purpose of providing unaudited pro forma condensed combined financial information. Differences between these preliminary estimates and the final acquisition accounting may occur and these differences could be material. Additionally, the differences, if any, could have a material impact on the accompanying unaudited pro forma condensed combined financial statements and Expedia’s future results of operation and financial position.

The unaudited pro forma condensed combined financial information is presented for illustrative purposes only and does not purport to represent what the results of operations or financial position of Expedia would actually have been had the acquisitions occurred on the dates noted above, or to project the results of operations or financial position of Expedia for any future periods. The unaudited pro forma adjustments are based on available information and certain assumptions that Expedia management believes are reasonable. The unaudited pro forma adjustments are directly attributable to the acquisition and are expected to have a continuing impact on the results of operations of Expedia. In the opinion of Expedia management, all adjustments necessary to present fairly the unaudited pro forma condensed combined financial information have been made.

The accompanying unaudited pro forma condensed combined financial information should be read in conjunction with the notes hereto and with Expedia’s, Orbitz’ and HomeAway’s historical consolidated financial statements and accompanying notes, which are incorporated by reference herein. See “Where You Can Find More Information.”

EXPEDIA, INC.

PRO FORMA CONDENSED COMBINED BALANCE SHEET

As of September 30, 2015

(in thousands)

(Unaudited)

See accompanying notes to unaudited pro forma condensed combined financial information.

EXPEDIA, INC.

PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS

For the Nine Months Ended September 30, 2015

(in thousands, except for per share data)

(Unaudited)

See accompanying notes to unaudited pro forma condensed combined financial information.

EXPEDIA, INC.

PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS

For the Year Ended December 31, 2014

(in thousands, except for per share data)

(Unaudited)

See accompanying notes to unaudited pro forma condensed combined financial information.

Notes to Unaudited Pro Forma Condensed Combined Financial Information

Note 1.    Basis of Pro Forma Presentation

The unaudited pro forma condensed combined balance sheet as of September 30, 2015 and the unaudited pro forma condensed combined statements of operations for the nine months ended September 30, 2015 and for the year ended December 31, 2014 are based on (i) historical results of operations of Expedia and its subsidiaries (which include the results of Orbitz subsequent to Expedia’s September 17, 2015 acquisition of Orbitz); (ii) the historical consolidated results of operations of HomeAway; and (iii) and the historical consolidated results of operations of Orbitz for the year ended December 31, 2014 and for the period January 1, 2015 through September 16, 2015 (which were used solely for the preparation of the pro forma combined condensed statement of operations for the year ended December 31, 2014 and the nine months ended September 30, 2015).

The pro forma financial information related to the HomeAway and Orbitz acquisitions is based on the assumption that the acquisition of HomeAway took place as of September 30, 2015 for purposes of the unaudited pro forma balance sheet and that the acquisitions of both HomeAway and Orbitz took place as of January 1, 2014 for purposes of the unaudited pro forma condensed combined statements of operations. Because Orbitz was acquired on September 17, 2015, the results of operations of Orbitz are included in Expedia’s consolidated financial results subsequent to that date. The historical financial information is adjusted in the unaudited pro forma financial statements to give effect to unaudited pro forma adjustments that are (1) directly attributable to the acquisition, (2) factually supportable, and (3) with respect to the unaudited pro forma statements of operations, expected to have a continuing impact on the combined results.

The unaudited pro forma financial statements are presented solely for informational purposes and are not necessarily indicative of the combined results of operations or financial position that might have been achieved for the periods or dates indicated, nor is it necessarily indicative of the future results of the combined company.

The unaudited pro forma financial statements do not reflect any cost savings from future operating synergies or integration activities, or any revenue, tax, or other synergies that could result from the acquisition.

The following reclassifications have been made to Orbitz’ historical consolidated results of operations for the year ended December 31, 2014 to conform to Expedia’s presentation:

As historic information for Orbitz for the full period of January 1, 2015 to September 16, 2015 has not previously been provided, no reclassifications were required. The historic information for Orbitz for such period presented herein conforms with Expedia’s presentation.

There were no material reclassifications identified to conform the HomeAway consolidated results of operations for the nine months ended September 30, 2015 or the year ended December 31, 2014 to Expedia’s presentation.

Note 2.    Estimated HomeAway Purchase Consideration and Preliminary Purchase Price Allocation

The following summarizes the preliminary allocation of the purchase price for HomeAway based on the terms of the Transaction Agreement and Expedia’s preliminary estimates of fair value of assets and liabilities as if the acquisition had occurred on September 30, 2015. The final determination of the allocation of the purchase price will be based on the fair value of such assets and liabilities as of the actual closing date.

Estimated Purchase Consideration Sensitivity. The table below illustrates the potential impact to the total estimated consideration resulting from a 10% increase or decrease in the price of Expedia’s common stock of $133.32 on November 6, 2015. For the purpose of this calculation, the total number of shares and vested equity awards has been assumed to be the same as in the table above:

For pro forma purposes, Expedia assumed the cash portion of the transaction will be funded with a combination of available cash, the net proceeds of the Notes offered hereby, as well as a borrowing of approximately $405 million on its $1 billion Revolving Credit Facility. Borrowing on the credit facility will fluctuate depending on the timing of the closing of the HomeAway acquisition and the available cash at that time. Expedia anticipates issuing approximately $500 million of senior unsecured notes with a term of ten years.

Note 3.    Pro Forma Adjustments

Balance Sheet Adjustments. The unaudited pro forma adjustments related to HomeAway included in the unaudited pro forma condensed combined balance sheet are as follows:

To eliminate the historical net book value of HomeAway’s capitalized software of $39 million for which the preliminary fair value was determined in purchase accounting and is included in intangible assets.

Estimated debt issuance costs associated with the issuance of the Notes offered hereby.

To record Expedia’s estimated borrowing on the Revolving Credit Facility to fund a portion of the HomeAway estimated purchase price (See Note 2).

To record preliminary fair value adjustments to acquired other long-term liabilities primarily related to deferred rent as well as fair value adjustments to acquired redeemable non-controlling interest.

To eliminate $61 million of historical accumulated other comprehensive loss of HomeAway.

Orbitz

Statement of Operations Adjustments. The unaudited pro forma adjustments related to Orbitz included in the unaudited pro forma condensed combined statements of operations for period January 1, 2015 through September 16, 2015 and for the year ended December 31, 2014 are as follows:

To eliminate intercompany revenue between Orbitz and a majority-owned, Expedia subsidiary.

To eliminate $0.2 million and $0.3 million of historical amortization expense of Orbitz for the nine months ended September 30, 2015 and year ended December 31, 2014 and record a preliminary estimate of $54 million and $129 million of amortization expense for the nine months ended September 30, 2015 and year ended December 31, 2014 related to the acquired identifiable intangible assets of Orbitz calculated as if the acquisition had occurred on January 1, 2014. Preliminary acquired definite-lived assets consist of customer relationship assets, developed technology assets and partner relationship assets with average lives ranging from less than one to ten years.

To recognize expense or gain on occupancy tax payments made in advance of litigation or related refunds when paid or received by Orbitz to conform to Expedia’s accounting policy.

To eliminate expenses recognized related to employee severance and benefits, including stock-based compensation, triggered by and directly related to the Orbitz acquisition.

To eliminate $23 million and $24 million of historical interest expense of Orbitz for the nine months ended September 30, 2015 and year ended December 31, 2014 related to the debt repaid at closing of the acquisition and record $5 million and $12 million of interest expense for the nine months ended September 30, 2015 and year ended December 31, 2014 related to Expedia’s €650 million of registered senior unsecured notes that were issued in June 2015 and bear interest at 2.5%. The proceeds of Expedia’s June 2015 debt issuance were used to fund a portion of the cash consideration payable in connection with its acquisition of Orbitz.

To record the tax effect of the pro forma adjustments on the changes to income before income taxes using an estimated statutory tax rate of 35.0%.

To record the non-controlling interest impact of the elimination of intercompany revenue between Orbitz and a majority-owned Expedia subsidiary.

HomeAway

Statement of Operations Adjustments. The unaudited pro forma adjustments related to HomeAway included in the unaudited pro forma condensed combined statements of operations for the nine months ended September 30, 2015 and for the year ended December 31, 2014 are as follows:

To adjust depreciation expense related to the removal of historical net book value of capitalized software.

To eliminate $9 million and $14 million of historical amortization expense of HomeAway for the nine months ended September 30, 2015 and year ended December 31, 2014 and record a preliminary estimate of $108 million and $144 million of amortization expense for the nine months ended September 30, 2015 and year ended December 31, 2014 related to the acquired identifiable intangible assets of HomeAway calculated as if the acquisition had occurred on January 1, 2014.

To eliminate $14 million of historical interest expense of HomeAway for both the nine months ended September 30, 2015 and year ended December 31, 2014 as the Convertible Notes are expected to be repurchased within 60 days of the closing of the acquisition.

To record interest expense as well as amortization of debt issuance costs of $19 million and $25 million for the nine months ended September 30, 2015 and year ended December 31, 2014, respectively, for the Notes offered hereby. In addition, to fund a portion of the purchase price Expedia expects to borrow under the Revolving Credit Facility and, as such, interest expense was increased $5 million and $7 million for the nine months ended September 30, 2015 and the year ended December 31, 2014.

Expedia assumed a weighted average interest rate on the Notes offered hereby and the borrowings under its Revolving Credit Facility of 3.51% and 3.49% for the nine months ended September 30, 2015 and the year ended December 31, 2014, respectively. If these interest rates were to vary by 0.125%, the impact to interest expense for both periods would be approximately $0.8 million and $1.1 million for the nine months ended September 30, 2015 and the year ended December 31, 2014, respectively.

To record the tax effect of the pro forma adjustments on the changes to income before income taxes using an estimated statutory tax rate of 35.0%.

Pro forma earnings per common share are based on historical Expedia weighted average shares outstanding, adjusted to assume the shares estimated to be issued by Expedia for the HomeAway acquisition were outstanding for the entire period presented.