Title: Cheap Flights from St. Thomas (STT) to Washington (IAD) - Expedia.ca ![Washington DC in Spring](https://images.trvl-media.com/place/3763/58eb1a51-e7f1-4f17-88af-21174d495e42.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/3763/58eb1a51-e7f1-4f17-88af-21174d495e42.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from St. Thomas (STT) to Washington (IAD) ## Popular airlines from Cyril E. King Airport (STT) to Washington Dulles International Airport (IAD) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.ca/Flights-Search?leg1=from:STT,to:IAD,departure:26/03/2026TANYT&leg2=from:IAD,to:STT,departure:02/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.ca/Flights-Search?leg1=from:STT,to:IAD,departure:26/03/2026TANYT&leg2=from:IAD,to:STT,departure:02/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:STT,to:IAD,departure:26/03/2026TANYT&leg2=from:IAD,to:STT,departure:02/04/2026TANYT&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 rewards [Sign in](https://www.expedia.ca/login) ## Cheap flights from St. Thomas (STT) to Washington (IAD) Prices were available within the past 7 days and start at for one-way flights and CA $576 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Sat, Sep 26 - Sun, Sep 27 STT St. Thomas IAD Washington CA $576 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STT,to:IAD,departure:26/09/2026TANYT&leg2=from:IAD,to:STT,departure:27/09/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:576.00&airProductToken=AQppCjMI1YIBEgQxNTMwGPKcASDEjQEoouyYAzCj7pgDOExAAFgBagUyX2Vjb3IITE5BN0E5RE4KMgjVggESBDE3ODQYxI0BIIgYKObvmAMwuvCYAzhMQABYAWoFMl9lY29yCExOQTdBOUROCmkKMgjVggESBDIxNDcYiBggxI0BKNjzmAMwpfSYAzhHQABYAWoFMl9lY29yCEdOQTJBOUROCjMI1YIBEgQxNTI5GMSNASDynAEojvWYAzCE95gDOEdAAFgBagUyX2Vjb3IIR05BMkE5RE4SCggBEAEYASoCVUEYASIECAEQASgCKAMoBDAL) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Sat, Sep 26 - Sun, Sep 27 STT St. Thomas IAD Washington CA $599 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STT,to:IAD,departure:26/09/2026TANYT&leg2=from:IAD,to:STT,departure:27/09/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:598.20&airProductToken=AQo0CjII1YIBEgQxNDQ1GPKcASCIGCi97ZgDMLXvmAM4TEAAWAFqBTJfZWNvcghMTkE3QTlETgppCjII1YIBEgQyMTQ3GIgYIMSNASjY85gDMKX0mAM4R0AAWAFqBTJfZWNvcghHTkEyQTlETgozCNWCARIEMTUyORjEjQEg8pwBKI71mAMwhPeYAzhHQABYAWoFMl9lY29yCEdOQTJBOUROEgoIARABGAEqAlVBGAEiBAgBEAEoAigDKAQwCw) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Sat, Sep 26 - Sun, Sep 27 STT St. Thomas IAD Washington CA $724 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STT,to:IAD,departure:26/09/2026TANYT&leg2=from:IAD,to:STT,departure:27/09/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:723.20&airProductToken=AQo1CjMI1YIBEgQxNDQ1GPKcASCIGCi97ZgDMLXvmAM4VEAAWAFqBkVDT1JFRnIIVE5BMkE5RE0KawozCNWCARIEMjE0NxiIGCDEjQEo2POYAzCl9JgDOEdAAFgBagZFQ09SRUZyCEdOQTJBOURNCjQI1YIBEgQxNTI5GMSNASDynAEojvWYAzCE95gDOEdAAVgBagZFQ09SRUZyCEdOQTJBOURNEgoIAhABGAIqAlVBGAEiBAgBEAEoAigEKAYwAQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Sat, Sep 26 - Sun, Sep 27 STT St. Thomas IAD Washington CA $737 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STT,to:IAD,departure:26/09/2026TANYT&leg2=from:IAD,to:STT,departure:27/09/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:737.00&airProductToken=AQprCjQI1YIBEgQxNTMwGPKcASDEjQEoouyYAzCj7pgDOFRAAFgBagZFQ09SRUZyCFROQTJBOURNCjMI1YIBEgQxNzg0GMSNASCIGCjm75gDMLrwmAM4VEABWAFqBkVDT1JFRnIIVE5BMkE5RE0KawozCNWCARIEMjE0NxiIGCDEjQEo2POYAzCl9JgDOEdAAFgBagZFQ09SRUZyCEdOQTJBOURNCjQI1YIBEgQxNTI5GMSNASDynAEojvWYAzCE95gDOEdAAVgBagZFQ09SRUZyCEdOQTJBOURNEgoIAhABGAIqAlVBGAEiBAgBEAEoAigEKAYwAQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Sat, Sep 26 - Sun, Sep 27 STT St. Thomas IAD Washington CA $993 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STT,to:IAD,departure:26/09/2026TANYT&leg2=from:IAD,to:STT,departure:27/09/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:992.20&airProductToken=AQo2CjQI1YIBEgQxNDQ1GPKcASCIGCi97ZgDMLXvmAM4VEAAWAFqB0VDT05PTVlyCFROQTJBOUROCmMKNAjVggESBDIwMjEYiBggsqIBKPf0mAMw4vaYAzhMQABYAWoHRUNPTk9NWXIITE5BN0E5RE4KKwi5lgESBDgyOTEYsqIBIPKcASi495gDMNv3mAM4WEABWAFqAkVScgNYSVASCggBEAEYASoCVUEYASIECAEQASgCKAMoBDAB) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Sat, Sep 26 - Sun, Sep 27 STT St. Thomas IAD Washington CA $999 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STT,to:IAD,departure:26/09/2026TANYT&leg2=from:IAD,to:STT,departure:27/09/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:998.30&airProductToken=AQptCjUI1YIBEgQxNTMwGPKcASDEjQEoouyYAzCj7pgDOFRAAFgBagdFQ09OT01ZcghUTkEyQTlETgo0CNWCARIEMTc4NBjEjQEgiBgo5u-YAzC68JgDOFRAAVgBagdFQ09OT01ZcghUTkEyQTlETgpjCjQI1YIBEgQyMDIxGIgYILKiASj39JgDMOL2mAM4TEAAWAFqB0VDT05PTVlyCExOQTdBOUROCisIuZYBEgQ4MjkxGLKiASDynAEouPeYAzDb95gDOFhAAVgBagJFUnIDWElQEgoIARABGAEqAlVBGAEiBAgBEAEoAigDKAQwAQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Sat, Sep 26 - Sun, Sep 27 STT St. Thomas IAD Washington CA $1,450 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STT,to:IAD,departure:26/09/2026TANYT&leg2=from:IAD,to:STT,departure:27/09/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1449.30&airProductToken=AQo0CjII1YIBEgQxNDQ1GPKcASCIGCi97ZgDMLXvmAM4TEAAWAFqBTJfZWNvcghMTkE3QTlETgqqAQoyCNWCARIEMjE0NxiIGCDEjQEo2POYAzCl9JgDOFVAAFgBagUyX2Vjb3IIVU5BMEE5RU4KMwjVggESBDE1NTYYxI0BILKiASi49ZgDMKn3mAM4VUAAWAFqBTJfZWNvcghVTkEwQTlFTgo_CNWCARIENjQxMxiyogEg8pwBKN34mAMwgPmYAzhVQABYAWoFMl9lY29yCFVOQTBBOUVOegoIuZYBEgQ2NDEzEgoIARABGAEqAlVBGAEiBAgBEAEoAigDKAQwCw) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Sat, Sep 26 - Sun, Sep 27 STT St. Thomas IAD Washington CA $5,075 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STT,to:IAD,departure:26/09/2026TANYT&leg2=from:IAD,to:STT,departure:27/09/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:5074.30&airProductToken=AQo4CjYI1YIBEgQxNDQ1GPKcASCIGCi97ZgDMLXvmAM4QkAAWAFqCTdfZWNvdW5yc3IIQk5BMEFVRVkKtgEKNgjVggESBDIxNDcYiBggxI0BKNjzmAMwpfSYAzhCQABYAWoJN19lY291bnJzcghCTkEwQVVFWQo3CNWCARIEMTU1NhjEjQEgsqIBKLj1mAMwqfeYAzhCQABYAWoJN19lY291bnJzcghCTkEwQVVFWQpDCNWCARIENjQxMxiyogEg8pwBKN34mAMwgPmYAzhCQABYAWoJN19lY291bnJzcghCTkEwQVVFWXoKCLmWARIENjQxMxIKCAEQARgBKgJVQRgBIgQIARABKAIoAygEMAs) ![](https://forever.travel-assets.com/flex/flexmanager/images/2026/02/06/expedia-sale-2026-desktop-us-ca.jpg?impolicy=fcrop&w=1400&h=600&q=mediumHigh) ## The Annual Vacation Sale Members save up to 40% on hotels and homes. Plan this year’s big trip and save. [Book now](https://expedia.ca/deals?rfrr=FTG_SPRING_PROMO_) ## Find the cheapest month to fly from St. Thomas (STT) to Washington (IAD) ### January is typically the cheapest month to fly From CA $407 - CA $1,876 per traveller. ## Frequently asked questions ### How much is a flight from Cyril E. King Airport (STT) to IAD? ### Do I need to pay a cancellation fee if I cancel my flight from STT to Washington Dulles Intl. Airport (IAD)? ### How do I find cheap flights from Cyril E. King Airport to Washington Dulles Intl. Airport (IAD) that have flexible change policies? ### How many hours is the flight from Cyril E. King Airport to Dulles Intl. Airport? ### How far is the flight from Cyril E. King Airport to Dulles Intl. Airport? ### Which airlines fly direct from Cyril E. King Airport to IAD? ### Are STT to Dulles Intl. Airport flight tickets cheaper when they're purchased at the last minute? ## Travel information | Origin airport | Cyril E. King | | ------------------- | ----------------------- | | Destination airport | Washington Dulles Intl. | | Roundtrip price | CA $576 | | Distance | 2574 km | | Average flight time | 5 hours 23 mins | ## Book with confidence # St. Thomas to Chantilly Flights **The easy way to book your flights from St. Thomas to Washington** With Expedia, it’s simple to find and book flights to Washington from St. Thomas whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 8 airlines that cover this route. There are nonstop flights to Washington Dulles Intl., too. Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from St. Thomas to Washington today, tomorrow, or this week. **Save dollars with cheap flights from Cyril E. King, STT to Washington Dulles Intl., IAD** Sort your search results by price to find great deals on your flight from St. Thomas to Washington—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Washington from St. Thomas currently is just CA $576 rising to CA $5,075\. Here are more money-saving tips: - Fly in September when flight prices are normally at their lowest - Book about a month to 6 weeks before you travel for the best prices to Washington - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! **Reasons to choose Expedia for your flight to Washington from St. Thomas** Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Washington with Expedia today. \*Available to Expedia members.