Title: $742 Cheap flights from Chicago to Perth (ORD to PER) - Expedia.com ![Elizabeth Quay which includes a sunset, a city and a bay or harbor](https://images.trvl-media.com/place/553248621593151427/ffa3044e-03de-4748-8599-8aef955dbd0f.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/553248621593151427/ffa3044e-03de-4748-8599-8aef955dbd0f.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # $742 Cheap Flights from Chicago (ORD) to Perth (PER) [View $742 flight on Tue, Mar 17, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:ORD,to:PER,departure:3/17/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:742.00&airProductToken=AQqCAQoqCMGCARIEMjg5MRiuHCCLuAEokO6HAzCn8IcDOFFAAFgBcgdPTE9YQlVTCikI0KQBEgMxMTMYi7gBIKxbKKrxhwMw5fiHAzhPQAFYAXIHT0xPWEJVUwopCNCkARIDMjIzGKxbII-JASiv-4cDMNj-hwM4T0ABWAFyB09MT1hCVVMSCggBEAEYASoCUFIYASIECAEQASgCKAMoBDAB) - [Roundtrip](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travelers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Chicago O'Hare Intl. Airport (ORD) to Perth Airport (PER) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_QR.svg) Qatar Airways [](https://www.expedia.com/Flights-Search?leg1=from:ORD,to:PER,departure:2/24/2026TANYT&leg2=from:PER,to:ORD,departure:3/3/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"QR"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_QF.svg) Qantas Airways [](https://www.expedia.com/Flights-Search?leg1=from:ORD,to:PER,departure:2/24/2026TANYT&leg2=from:PER,to:ORD,departure:3/3/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"QF"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_EK.svg) Emirates [](https://www.expedia.com/Flights-Search?leg1=from:ORD,to:PER,departure:2/24/2026TANYT&leg2=from:PER,to:ORD,departure:3/3/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"EK"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_CX.svg) Cathay Pacific [](https://www.expedia.com/Flights-Search?leg1=from:ORD,to:PER,departure:2/24/2026TANYT&leg2=from:PER,to:ORD,departure:3/3/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"CX"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_NZ.svg) Air New Zealand [](https://www.expedia.com/Flights-Search?leg1=from:ORD,to:PER,departure:2/24/2026TANYT&leg2=from:PER,to:ORD,departure:3/3/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"NZ"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_B6.svg) JetBlue Airways [](https://www.expedia.com/Flights-Search?leg1=from:ORD,to:PER,departure:2/24/2026TANYT&leg2=from:PER,to:ORD,departure:3/3/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"B6"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.com/Flights-Search?leg1=from:ORD,to:PER,departure:2/24/2026TANYT&leg2=from:PER,to:ORD,departure:3/3/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our OneKeyCash [Learn about One Key](https://www.expedia.com/welcome-one-key) ## Cheap Flights from Chicago to Perth (ORD-PER) Prices were available within the past 7 days and start at $742 for one-way flights and $1,399 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Sun, Oct 11 - Sat, Oct 17 ORD Chicago PER Perth $1,399 Roundtrip found 6 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ORD,to:PER,departure:10/11/2026TANYT&leg2=from:PER,to:ORD,departure:10/17/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1398.19&airProductToken=AQqlAQoyCMGGARIEMTA0ORiuHCC4jQEomJaaAzCrmJoDOEdAAFgBagVCQVNJQ3IIR0xYUDAzQkEKMAjBhgESAjMzGLiNASCSHijDmpoDMOChmgM4R0ABWAFqBUJBU0lDcghHTFhQMDNCQQo9CMGGARIEMjczORiSHiCPiQEo2qOaAzCVppoDOEdAAVgBagVCQVNJQ3IIR0xYUDAzQkF6CQjWggESAzU1NwqZAQoxCMqiARIDOTY1GI-JASChIyiJ15oDMJLZmgM4SUAAWAFqBUJBU0lDcghHTFhQMDNCQQowCMGGARICMzYYoSMguI0BKKDbmgMwyeGaAzhHQAFYAWoFQkFTSUNyCEdMWFAwM0JBCjIIwYYBEgQxMDQ4GLiNASCuHCjC4poDMMTkmgM4R0ABWAFqBUJBU0lDcghHTFhQMDNCQRIKCAgQAhgCKgJBQxgBIgQIARABKAcoAygEMAE) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Sun, Oct 11 - Sat, Oct 17 ORD Chicago PER Perth $1,401 Roundtrip found 6 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ORD,to:PER,departure:10/11/2026TANYT&leg2=from:PER,to:ORD,departure:10/17/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1400.29&airProductToken=AQqlAQoyCMGGARIEMTA0ORiuHCC4jQEomJaaAzCrmJoDOEdAAFgBagVCQVNJQ3IIR0xYUDAzQkEKMAjBhgESAjMzGLiNASCSHijDmpoDMOChmgM4R0ABWAFqBUJBU0lDcghHTFhQMDNCQQo9CMGGARIEMjczORiSHiCPiQEo2qOaAzCVppoDOEdAAVgBagVCQVNJQ3IIR0xYUDAzQkF6CQjWggESAzU1NwqlAQo9CMGGARIEMjczNhiPiQEgkh4opNOaAzCo1ZoDOEdAAFgBagVCQVNJQ3IIR0xYUDAzQkF6CQjWggESAzU2MgowCMGGARICMzQYkh4guI0BKPjamgMw3uGaAzhHQAFYAWoFQkFTSUNyCEdMWFAwM0JBCjIIwYYBEgQxMDQ4GLiNASCuHCjC4poDMMTkmgM4R0ABWAFqBUJBU0lDcghHTFhQMDNCQRIKCAgQAhgCKgJBQxgBIgQIARABKAcoAygEMAE) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Tue, Sep 15 - Tue, Sep 22 ORD Chicago PER Perth $1,402 Roundtrip found 6 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ORD,to:PER,departure:9/15/2026TANYT&leg2=from:PER,to:ORD,departure:9/22/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1401.76&airProductToken=AQqlAQoyCMGGARIEMTA0ORiuHCC4jQEo2PGXAzDr85cDOEdAAFgBagVCQVNJQ3IIR0xYUDAzQkEKMAjBhgESAjM1GLiNASChIyir9pcDMJH9lwM4R0ABWAFqBUJBU0lDcghHTFhQMDNCQQo9CMGGARIEMjc0MBihIyCPiQEojv6XAzDngJgDOEdAAVgBagVCQVNJQ3IIR0xYUDAzQkF6CQjWggESAzQ2MgqlAQo9CMGGARIEMjczOBiPiQEgkh4om76YAzCfwJgDOEdAAFgBagVCQVNJQ3IIR0xYUDAzQkF6CQjWggESAzU3MgowCMGGARICMzQYkh4guI0BKNjBmAMwvsiYAzhHQAFYAWoFQkFTSUNyCEdMWFAwM0JBCjIIwYYBEgQxMDQ4GLiNASCuHCiiyZgDMKTLmAM4R0ABWAFqBUJBU0lDcghHTFhQMDNCQRIKCAgQAhgCKgJBQxgBIgQIARABKAcoAygEMAE) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Sun, Apr 12 - Sun, May 3 ORD Chicago PER Perth $1,404 Roundtrip found 6 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ORD,to:PER,departure:4/12/2026TANYT&leg2=from:PER,to:ORD,departure:5/3/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1403.76&airProductToken=AQqYAQoxCMGGARIDNTA2GK4cIJjOASj0lYoDMNqWigM4R0AAWAFqBUJBU0lDcghHTFhQMDNCQQowCMGGARICMzMYmM4BIJIeKNWXigMwoKKKAzhHQAFYAWoFQkFTSUNyCEdMWFAwM0JBCjEI1oIBEgM1NTkYkh4gj4kBKKGligMw3KeKAzhJQAFYAWoFQkFTSUNyCEdMWFAwM0JBCqUBCjEI1oIBEgM1NzIYj4kBIJIeKNuAjAMw34KMAzhJQABYAWoFQkFTSUNyCEdMWFAwM0JBCjAIwYYBEgIzNBiSHiC4jQEomISMAzD-iowDOEdAAVgBagVCQVNJQ3IIR0xYUDAzQkEKPgjBhgESBDQ4NzYYuI0BIK4cKJ2OjAMwmpCMAzhHQAFYAWoFQkFTSUNyCEdMWFAwM0JBegoI1YIBEgQyMDQ4EgoICBACGAIqAkFDGAEiBAgBEAEoBygDKAQwAQ) ![Air New Zealand](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/NZ.gif) Tue, May 5 - Sat, May 16 ORD Chicago PER Perth $1,582 Roundtrip found 2 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ORD,to:PER,departure:5/5/2026TANYT&leg2=from:PER,to:ORD,departure:5/16/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1581.03&airProductToken=AQplCiEIzrQBEgQ5NjgzGK4cIIu4ASjMmYwDMOObjAM4S0AAWAEKHgjOtAESATUYi7gBIMBaKLadjAMwuKOMAzhLQAFYAQogCM60ARIDMTc1GMBaII-JASjDpowDMICqjAM4S0ABWAEKZQogCM60ARIDMTc0GI-JASDAWij2ko0DMOiVjQM4S0AAWAEKHgjOtAESATYYwFogi7gBKM-ajQMwpKCNAzhLQAFYAQohCM60ARIEOTY2NxiLuAEgrhwoj6KNAzCMpI0DOFNAAVgBEgoIARABGAEqAk5aGAEiBAgBEAEoBDAB) ![Qantas Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/QF.gif) Sat, Feb 28 - Sat, Mar 14 ORD Chicago PER Perth $1,651 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ORD,to:PER,departure:2/28/2026TANYT&leg2=from:PER,to:ORD,departure:3/14/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1650.23&airProductToken=AQqcAQo9CNGMARIENDkyMRiuHCCLuAEo2LKGAzDttIYDOE9AAFgBagRFQ1NMcghRV0FMS0dVU3oKCMGCARIEMjc2NwosCNGMARICMTYYi7gBIKEjKOK2hgMwtL2GAzhPQABYAWoERUNTTHIFT0pXN1MKLQjRjAESAzkzNRihIyCPiQEomr-GAzDVwYYDOFFAAFgBagRFQ1NMcgVPSlc3UwqnAQotCNGMARIDOTQyGI-JASChIyjQzYcDMN7PhwM4UUAAWAFqBEVDU0xyBU9KWDdTCjoI0YwBEgQ0OTI3GKEjIKOxASiw0YcDMKXYhwM4T0AAWAFqBEVDU0xyCFFXQUxLR1VTegcIwYIBEgE4CjoI0YwBEgQ0MzE0GKOxASCuHCip2YcDMLzahwM4T0AAWAFqBEVDU0xyBU9KWDdTegoIwYIBEgQzMjc3EgoIARABGAEqAlFGGAEiBAgBEAEoAigDKAQwCw) ![JetBlue Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/b6.gif) Thu, Feb 26 - Mon, Mar 2 ORD Chicago PER Perth $1,703 Roundtrip found 10 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ORD,to:PER,departure:2/26/2026TANYT&leg2=from:PER,to:ORD,departure:3/2/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1702.53&airProductToken=AQpkCh8IwmwSBDIxMDYYrhwgqVEoxJuGAzDRnIYDOFVAAFgBCh8IwmwSBDU1NTEYqVEgwzso-J6GAzDXpIYDOE9AAVgBCiAIwmwSBDY1MjQYwzsgj4kBKIyphgMwpa6GAzhPQAFYAQpkCiAIwmwSBDY1MjUYj4kBIMM7KNXGhgMwgsyGAzhPQABYAQofCMJsEgQ2NjQwGMM7IKlRKNnNhgMwsNSGAzhPQAFYAQofCMJsEgQxMzA1GKlRIK4cKJfXhgMwy9iGAzhQQAFYARIKCAEQARgBKgJCNhgBIgQIARABKAQwAQ) ![Swiss International Air Lines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LX.gif) Wed, Sep 2 - Wed, Sep 16 ORD Chicago PER Perth $1,800 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ORD,to:PER,departure:9/2/2026TANYT&leg2=from:PER,to:ORD,departure:9/16/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1799.73&airProductToken=AQqgAQoxCMywARIBORiuHCC5PCiF4ZYDMJLllgM4S0AAWAFqCEVDT1NBVkVScghLWDZYU1lOQwo0CMywARIEOTAwMBi5PCCSaijE5ZYDMLzrlgM4S0ABWAFqCEVDT1NBVkVScghLWDZYU1lOQwo1CMywARIEOTA0MBiSaiCPiQEo8-uWAzCu7pYDOEtAAVgBaghFQ09TQVZFUnIIS1g2WFNZTkMKnwEKNQjMsAESBDk1MDQYj4kBIMcyKLTzlwMwlPeXAzhLQABYAWoIRUNPU0FWRVJyCEtYNlhTWU5DCjMIzLABEgMxMzkYxzIguTwoqfqXAzC6gJgDOEtAAVgBaghFQ09TQVZFUnIIS1g2WFNZTkMKMQjMsAESATgYuTwgrhwo2YOYAzCniJgDOEtAAVgBaghFQ09TQVZFUnIIS1g2WFNZTkMSDAgCEAEYAioCTFgyABgBIgQIARABKAIoAygEMAs) ![Cathay Pacific](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/CX.gif) Wed, Sep 2 - Wed, Sep 16 ORD Chicago PER Perth $1,843 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ORD,to:PER,departure:9/2/2026TANYT&leg2=from:PER,to:ORD,departure:9/16/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1842.13&airProductToken=AQptCjQIw7ABEgM4MDEYrhwgxzIozN-WAzCM55YDOFZAAFgBaglFQ09OTElHSFRyCFZSMjFVU0lSCjUIw7ABEgMxNDMYxzIgj4kBKJPolgMw2uuWAzhWQAFYAWoJRUNPTkxJR0hUcghWUjIxVVNJUgptCjUIw7ABEgMxNzAYj4kBIMcyKMrvlwMwpfOXAzhWQABYAWoJRUNPTkxJR0hUcghWUjIxVVNJUgo0CMOwARIDODA2GMcyIK4cKJr1lwMwj_yXAzhWQAFYAWoJRUNPTkxJR0hUcghWUjIxVVNJUhIMCAEQARgBKgJDWDIAGAEiBAgBEAEoAigEKAYwAQ) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Sat, May 16 - Sat, Jun 13 ORD Chicago PER Perth $1,850 Roundtrip found 1 hour ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:ORD,to:PER,departure:5/16/2026TANYT&leg2=from:PER,to:ORD,departure:6/13/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1849.63&airProductToken=AQqsAQozCMyQARIDNDMzGK4cIKUEKLKYjQMwtZyNAzhLQABYAWoIRUNPU0FWRVJyCEtYNlhKWU5DCjMIzJABEgM3ODAYpQQgkmoohqCNAzD-pY0DOEtAAVgBaghFQ09TQVZFUnIIS1g2WEpZTkMKQAjMkAESBDk3OTYYkmogj4kBKMqpjQMw9quNAzhLQAFYAWoIRUNPU0FWRVJyCEtYNlhKWU5DegkI06IBEgMyMjUKrAEKQAjMkAESBDk3MTUYj4kBIMFSKJDHjwMwucqPAzhLQABYAWoIRUNPU0FWRVJyCEtYNlhKWU5DegkI1I4BEgM0ODQKMwjMkAESAzc3MxjBUiCMFSj7zY8DMKPTjwM4S0ABWAFqCEVDT1NBVkVScghLWDZYSllOQwozCMyQARIDNDM2GIwVIK4cKMDVjwMw_9mPAzhLQAFYAWoIRUNPU0FWRVJyCEtYNlhKWU5DEgoIARABGAEqAkxIGAEiBAgBEAEoAigDKAQwAQ) ## Alternative airports near Perth Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.com/Flights-Search?leg1=from:ORD,to:PER,departure:2/24/2026TANYT&leg2=from:PER,to:ORD,departure:2/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) PER Perth Airport CheapestClosest 14 min [Flights from $1,971 ](https://www.expedia.com/Flights-Search?leg1=from:ORD,to:PER,departure:2/24/2026TANYT&leg2=from:PER,to:ORD,departure:2/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## Find the cheapest month to fly from Chicago (ORD) to Perth (PER) ### March is typically the cheapest month to fly From $1,166 - $1,941 per traveler. __Flights from Chicago (ORD) to Perth (PER)__ | Origin airport | O'Hare Intl. | | ------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Destination airport | Perth | | Airlines serving | Air Canada, Air New Zealand, All Nippon Airways, American Airlines, Cathay Pacific, Emirates, Etihad Airways, Finnair, JetBlue Airways, Lufthansa, Malaysia Airlines, Qantas Airways, Qatar Airways, Singapore Airlines, Swiss International Air Lines, United | | Roundtrip price | $1,398 | | Distance | 10954 mi | ## Chicago to Perth Flights The cheapest times to fly from Chicago to Perth On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Chicago to Perth are during the month of October. You can find some of the cheapest flights from Chicago to Perth with Expedia's search tool and vast selection of airlines. The best time to book a flight from Chicago to Perth Sunday is one of the best days to book for cheap flights from Chicago to Perth: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance. How to find cheap round-trip tickets from Chicago to Perth Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Chicago to Perth in 2026\. You can also book with separate airlines for your outbound and return journeys, from $742 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference\*. This is available for a small fee, and is free to One Key Gold and Platinum tier members. Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Chicago to Perth flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps. You could also save big by booking one of Expedia's [vacation packages](https://www.expedia.com/package-deals). Bundling together your Chicago to Perth airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures. \*Terms apply. Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023\. The percentages you see are averages. ## Frequently asked questions ### How much does a flight from O'Hare Intl. Airport (ORD) to Perth Airport (PER) cost? ### What is the cheapest month to fly from O'Hare Intl. Airport (ORD) to Perth Airport (PER)? ### What is the cheapest airline that flies from O'Hare Intl. Airport (ORD) to Perth Airport (PER)? ### How many flights per day from O'Hare Intl. Airport (ORD) to Perth Airport (PER)? ### What day of the week has the most flights from ORD to PER? ### What is the best time to fly from O'Hare Intl. Airport (ORD) to Perth Airport (PER)? ### Is it cheaper to buy a plane ticket from O'Hare Intl. Airport (ORD) to Perth Airport (PER) last-minute? ### Is it cheaper to book an ORD to PER flight and hotel package? ### Can I cancel or change the date of my flight from O'Hare Intl. Airport (ORD) to Perth Airport (PER)? \*Flight schedules are subject to change. ## Explore a world of travel with Expedia - Lodging - Packages - Cars - [Hotels near Perth Airport ](https://www.expedia.com/Perth-Airport-Perth-Hotels.0-n553248634717476092-0.Travel-Guide-Filter-Hotels) - [Hotels near Redcliffe ](https://www.expedia.com/Redcliffe-Perth-Hotels.0-n6131305-0.Travel-Guide-Filter-Hotels) - [Hotels with Restaurants in Redcliffe ](https://www.expedia.com/Redcliffe-Perth-Hotels-Hotels-With-Restaurants.0-n6131305-0-tHotelswithRestaurants.Travel-Guide-Filter-Hotels) - [Casino Hotels in Redcliffe ](https://www.expedia.com/Redcliffe-Perth-Hotels-Casino-Hotel.0-n6131305-0-tCasinoHotel.Travel-Guide-Filter-Hotels) - [Hotels near Outdoor Airport Viewing Platform ](https://www.expedia.com/Outdoor-Airport-Viewing-Platform-Hotels.0-l553248621532608080-0.Travel-Guide-Filter-Hotels) - [Hotels near Ascot ](https://www.expedia.com/Ascot-Perth-Hotels.0-n181714-0.Travel-Guide-Filter-Hotels) - [Luxury Hotels in Ascot ](https://www.expedia.com/Ascot-Perth-Hotels-Luxury-Hotel.0-n181714-0-tLuxuryHotel.Travel-Guide-Filter-Hotels) - 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