Title: $312 Cheap flights from Washington to Waterloo (WAS to ALO) - Expedia.com ![Kitchener, Ontario, Canada](https://images.trvl-media.com/place/364/a1d7f410-d89f-41aa-b411-c2a6ad94eb89.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/364/a1d7f410-d89f-41aa-b411-c2a6ad94eb89.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # $312 Cheap Flights from Washington (WAS) to Waterloo (ALO) [View $312 flight on Sat, Jul 11, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:BWI,to:ALO,departure:7/11/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:311.70&airProductToken=AQpkCjAIwYIBEgQ0NzE3GMFFIK4cKOCMkgMw9Y2SAzhPQABYAWoETUFJTnIIT1dBWFpOTjEKMAjBggESBDQzMjEYrhwg4HIouo6SAzCLj5IDOE9AAVgBagRNQUlOcghPV0FYWk5OMRIMCAEQARgBKgJBQTIAGAEiBAgBEAEoAigDKAQwCw) ## Popular airlines from Washington to Waterloo, IA (ALO-Waterloo Regional) - ![](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:WAS,to:ALO,departure:4/11/2026TANYT&leg2=from:ALO,to:WAS,departure:4/18/2026TANYT&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 Washington to Waterloo (WAS-ALO) Prices were available within the past 7 days and start at $312 for one-way flights and $475 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Wed, Nov 4 - Sat, Nov 7 BWI Baltimore ALO Waterloo $475 Roundtrip found 3 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BWI,to:ALO,departure:11/4/2026TANYT&leg2=from:ALO,to:BWI,departure:11/7/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:474.90&airProductToken=AQpmCjEIwYIBEgQzNjc5GMFFIK4cKLSinAMwvaOcAzhCQABYAWoFQkFTSUNyCE9XRldLTkJaCjEIwYIBEgQ0MzI2GK4cIOByKN2jnAMwqqScAzhCQAFYAWoFQkFTSUNyCE9XRldLTkJaCmYKMQjBggESBDQzMjIY4HIgrhwo8MGcAzDKwpwDOEJAAFgBagVCQVNJQ3IIT1dGV1VOQloKMQjBggESBDM2NzkYrhwgwUUogcOcAzD2w5wDOEJAAVgBagVCQVNJQ3IIT1dGV1VOQloSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Fri, May 22 - Tue, May 26 DCA Washington ALO Waterloo $478 Roundtrip found 1 hour ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DCA,to:ALO,departure:5/22/2026TANYT&leg2=from:ALO,to:DCA,departure:5/26/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:477.64&airProductToken=AQplCjAIwYIBEgQyMzA0GEMgrhwovdSNAzDL1Y0DOEJAAFgBagVCQVNJQ3IIU1dBWllOQlgKMQjBggESBDQzMjYYrhwg4HIov9eNAzCU2I0DOEJAAVgBagVCQVNJQ3IITlVGV1pOQloKmgEKMQjBggESBDQzMjIY4HIgrhwo2ICOAzCqgY4DOEJAAFgBagVCQVNJQ3IITlVGV1pOQloKMgjBggESBDMyODAYrhwg4poBKMuEjgMwz4WOAzhCQAFYAWoFQkFTSUNyCE5WQUlYU0JYCjEIwYIBEgQyMzg2GOKaASBDKMGGjgMwoIeOAzhCQAFYAWoFQkFTSUNyCE5WQUlYU0JYEgoIARABGAEqAkFBGAEiBAgBEAEoAigDKAQwCw) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Wed, Jun 3 - Sat, Jun 6 BWI Baltimore ALO Waterloo $480 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BWI,to:ALO,departure:6/3/2026TANYT&leg2=from:ALO,to:BWI,departure:6/6/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:479.40&airProductToken=AQpmCjEIwYIBEgQ0NzE3GMFFIK4cKKDhjgMwxeKOAzhCQABYAWoFQkFTSUNyCE9XRldLTkJaCjEIwYIBEgQ0MzIxGK4cIOByKIPjjgMw1eOOAzhCQAFYAWoFQkFTSUNyCE9XRldLTkJaCmYKMQjBggESBDQzMjIY4HIgrhwouPyOAzCK_Y4DOEJAAFgBagVCQVNJQ3IIT1dGV1VOQloKMQjBggESBDM0NDYYrhwgwUUorP2OAzCq_o4DOEJAAVgBagVCQVNJQ3IIT1dGV1VOQloSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Wed, Nov 4 - Sat, Nov 7 DCA Washington ALO Waterloo $481 Roundtrip found 1 hour ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DCA,to:ALO,departure:11/4/2026TANYT&leg2=from:ALO,to:DCA,departure:11/7/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:480.90&airProductToken=AQplCjAIwYIBEgQyOTAzGEMgrhwo1J-cAzDcoJwDOEJAAFgBagVCQVNJQ3IIU1dBSVhOQlgKMQjBggESBDQzMjYYrhwg4HIo3aOcAzCqpJwDOEJAAVgBagVCQVNJQ3IITlVGV1pOQloKZAoxCMGCARIENDMyMhjgciCuHCjwwZwDMMrCnAM4QkAAWAFqBUJBU0lDcghOVUZXWk5CWgovCMGCARIDNjAzGK4cIEMoxMScAzCsxZwDOEJAAVgBagVCQVNJQ3IIU1dBSVhOQlgSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Fri, May 22 - Tue, May 26 DCA Washington ALO Waterloo $483 Roundtrip found 1 hour ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DCA,to:ALO,departure:5/22/2026TANYT&leg2=from:ALO,to:DCA,departure:5/26/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:482.94&airProductToken=AQqZAQowCMGCARIDMzY1GEMg4poBKJzTjQMw7tONAzhCQABYAWoFQkFTSUNyCFNXQVpZTkJYCjIIwYIBEgQyODQzGOKaASCuHCjA1I0DMMrVjQM4QkABWAFqBUJBU0lDcghTV0FaWU5CWAoxCMGCARIENDMyNhiuHCDgcii_140DMJTYjQM4QkABWAFqBUJBU0lDcghOVUZXWk5CWgqZAQoxCMGCARIENDMyMhjgciCuHCjYgI4DMKqBjgM4QkAAWAFqBUJBU0lDcghOVUZXWk5CWgoyCMGCARIEMzI4MBiuHCDimgEoy4SOAzDPhY4DOEJAAVgBagVCQVNJQ3IITlZBSVhTQlgKMAjBggESAzUyNxjimgEgQyi8h44DMJeIjgM4QkABWAFqBUJBU0lDcghOVkFJWFNCWBIKCAEQARgBKgJBQRgBIgQIARABKAIoAygEMAs) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Wed, Jun 3 - Sat, Jun 6 BWI Baltimore ALO Waterloo $485 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BWI,to:ALO,departure:6/3/2026TANYT&leg2=from:ALO,to:BWI,departure:6/6/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:484.70&airProductToken=AQqbAQoyCMGCARIEMjY3MBjBRSDimgEo59qOAzDJ244DOEJAAFgBagVCQVNJQ3IIT1dGV0tOQloKMgjBggESBDEwMzgY4poBIK4cKKrcjgMws92OAzhCQAFYAWoFQkFTSUNyCE9XRldLTkJaCjEIwYIBEgQ0MzI2GK4cIOByKL_ejgMwlN-OAzhCQAFYAWoFQkFTSUNyCE9XRldLTkJaCmYKMQjBggESBDQzMjIY4HIgrhwouPyOAzCK_Y4DOEJAAFgBagVCQVNJQ3IIT1dGV1VOQloKMQjBggESBDM0NDYYrhwgwUUorP2OAzCq_o4DOEJAAVgBagVCQVNJQ3IIT1dGV1VOQloSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Wed, Nov 4 - Sat, Nov 7 DCA Washington ALO Waterloo $504 Roundtrip found 1 hour ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DCA,to:ALO,departure:11/4/2026TANYT&leg2=from:ALO,to:DCA,departure:11/7/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:503.90&airProductToken=AQplCjAIwYIBEgQxOTQ0GEMgrhwot6KcAzC6o5wDOEJAAFgBagVCQVNJQ3IIT1dGV1VOQloKMQjBggESBDQzMjYYrhwg4HIo3aOcAzCqpJwDOEJAAVgBagVCQVNJQ3IIT1dGV1VOQloKZQoxCMGCARIENDMyNhjgciCuHCioxpwDMILHnAM4QkAAWAFqBUJBU0lDcghPV0ZXVU5CWgowCMGCARIENDQzNRiuHCBDKJzInAMwncmcAzhCQAFYAWoFQkFTSUNyCE9XRldVTkJaEgoIARABGAEqAkFBGAEiBAgBEAEoAigDKAQwCw) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Wed, Jun 3 - Sun, Jun 7 BWI Baltimore ALO Waterloo $517 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BWI,to:ALO,departure:6/3/2026TANYT&leg2=from:ALO,to:BWI,departure:6/7/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:516.40&airProductToken=AQpmCjEIwYIBEgQzNDQ2GMFFIK4cKOrcjgMw9N2OAzhCQABYAWoFQkFTSUNyCE9XRldLTkJaCjEIwYIBEgQ0MzI2GK4cIOByKL_ejgMwlN-OAzhCQAFYAWoFQkFTSUNyCE9XRldLTkJaCmYKMQjBggESBDQzMjIY4HIgrhwo2IePAzCqiI8DOEJAAFgBagVCQVNJQ3IIT1dGV1pOQloKMQjBggESBDM0NDYYrhwgwUUozIiPAzDKiY8DOEJAAVgBagVCQVNJQ3IIT1dGV1pOQloSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Wed, Jun 3 - Sun, Jun 7 BWI Baltimore ALO Waterloo $522 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BWI,to:ALO,departure:6/3/2026TANYT&leg2=from:ALO,to:BWI,departure:6/7/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:521.70&airProductToken=AQqbAQoyCMGCARIEMTcwOBjBRSDimgEondqOAzD02o4DOEJAAFgBagVCQVNJQ3IIT1dGV0tOQloKMgjBggESBDEwMzgY4poBIK4cKKrcjgMws92OAzhCQAFYAWoFQkFTSUNyCE9XRldLTkJaCjEIwYIBEgQ0MzI2GK4cIOByKL_ejgMwlN-OAzhCQAFYAWoFQkFTSUNyCE9XRldLTkJaCmYKMQjBggESBDQzMjIY4HIgrhwo2IePAzCqiI8DOEJAAFgBagVCQVNJQ3IIT1dGV1pOQloKMQjBggESBDM0NDYYrhwgwUUozIiPAzDKiY8DOEJAAVgBagVCQVNJQ3IIT1dGV1pOQloSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Fri, Sep 4 - Sun, Sep 6 DCA Washington ALO Waterloo $531 Roundtrip found 1 hour ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DCA,to:ALO,departure:9/4/2026TANYT&leg2=from:ALO,to:DCA,departure:9/6/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:530.90&airProductToken=AQplCjAIwYIBEgQxMDgwGEMgrhwo-_SWAzCA9pYDOEJAAFgBagVCQVNJQ3IIU1dBSVlOQloKMQjBggESBDQzMjEYrhwg4HIog_mWAzDQ-ZYDOEJAAVgBagVCQVNJQ3IITlVGV1pOQloKZQoxCMGCARIENDMyMhjgciCuHCj0h5cDMMWIlwM4QkAAWAFqBUJBU0lDcghOVUZXWk5CWgowCMGCARIEMjMwNBiuHCBDKMiKlwMws4uXAzhCQAFYAWoFQkFTSUNyCFNXQVpaTkJaEgoIARABGAEqAkFBGAEiBAgBEAEoAigDKAQwCw) ## Travel information | Origin airport | Baltimore Washington Intl. Thurgood Marshall | | ------------------- | -------------------------------------------- | | Destination airport | Waterloo Regional | | Airlines serving | American Airlines | | Roundtrip price | $475 | | Distance | 852 mi | ## Book with confidence # Washington to Waterloo Flights The cheapest times to fly from Washington to Waterloo 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 Washington to Waterloo are during the month of November. You can find some of the cheapest flights from Washington to Waterloo with Expedia's search tool and vast selection of airlines. The best time to book a flight from Washington to Waterloo Sunday is one of the best days to book for cheap flights from Washington to Waterloo: 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 Washington to Waterloo 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 Washington to Waterloo in 2026\. You can also book with separate airlines for your outbound and return journeys, from $312 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 Washington to Waterloo 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 Washington to Waterloo 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. \*Flight schedules are subject to change. \*Available to One Key members.