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Dulles Intl

$178+ Cheap flights from Saint Thomas Island (STT) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
STT — IAD
Sep 16 — Sep 231
Wed 9/16
Wed 9/23
1 adult, Economy
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Cheap flight deals from Saint Thomas Island to Dulles Intl

Cheapest flights from Saint Thomas Island to Dulles Intl
Explore the most affordable flight options available from Saint Thomas Island to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 17, 2026.

This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/251:07 pm -
Nonstop4h 23m
Sun 11/298:56 am -
Nonstop4h 00m
Deal found 8/12$351
This American Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/42:01 pm -
1 stop7h 53m
Tue 11/107:00 am -
1 stop7h 38m
Deal found 8/15$352
This United Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/302:00 pm -
1 stop7h 27m
Mon 11/28:56 am -
Nonstop4h 00m
Deal found 8/13$356
This United Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/41:07 pm -
Nonstop4h 23m
Tue 11/108:56 am -
Nonstop4h 00m
Deal found 8/15$389
This United Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/264:45 pm -
Nonstop4h 05m
Sat 10/39:00 am -
Nonstop3h 58m
Deal found 8/17$435
This American Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/301:21 pm -
1 stop7h 35m
Mon 11/27:17 pm -
1 stop16h 56m
Deal found 8/13$492
This United Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/174:45 pm -
Nonstop4h 05m
Sat 11/76:00 am -
1 stop9h 20m
Deal found 8/13$496
This American Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/171:21 pm -
1 stop7h 55m
Sat 11/77:17 pm -
1 stop17h 21m
Deal found 8/16$567

Find flight deals from Saint Thomas Island to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Saint Thomas Island (STT) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$351
(United Airlines)

One-way from

$178
(United Airlines)

Popular in

August

Cheapest in

April

Average price

$1,306

Good round-trip deal

$400 or less

Good one-way deal

$300 or less
Provider with most accurate pricing for Saint Thomas Island Cyril E King-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Saint Thomas Island Cyril E King-Washington, D.C. Dulles Intl flights.
Search Deals
From Saint Thomas Island Cyril E King to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Saint Thomas Island Cyril E King to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 28% potential increase in price ($222 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 17% potential price decrease ($84 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Saint Thomas Island Cyril E King to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Saint Thomas Island Cyril E King to Washington, D.C. Dulles Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Saint Thomas Island to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 17, 2026.
Use the filters below to find and compare flights from Saint Thomas Island to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Saint Thomas IslandWashington, D.C.

STT Saint Thomas Island Cyril E King - IAD Washington, D.C. Dulles Intl

STTIAD

Saint Thomas Island Cyril E King

Wed 11/25

1:07 pm-4:30 pm

Nonstop4h 23m

Washington, D.C. Dulles Intl

Sun 11/29

8:56 am-1:56 pm

Nonstop4h 00m

$351

Saint Thomas IslandWashington, D.C.

STT Saint Thomas Island Cyril E King - IAD Washington, D.C. Dulles Intl

STTIAD

Saint Thomas Island Cyril E King

Fri 10/30

12:07 pm-4:30 pm

Nonstop4h 23m

Washington, D.C. Dulles Intl

Mon 11/2

8:56 am-1:56 pm

Nonstop4h 00m

$379

Saint Thomas IslandWashington, D.C.

STT Saint Thomas Island Cyril E King - IAD Washington, D.C. Dulles Intl

STTIAD

Saint Thomas Island Cyril E King

Sat 9/26

4:45 pm-8:50 pm

Nonstop4h 05m

Washington, D.C. Dulles Intl

Sat 10/3

6:15 am-3:43 pm

1 stop9h 28m

$443

Saint Thomas IslandWashington, D.C.

STT Saint Thomas Island Cyril E King - IAD Washington, D.C. Dulles Intl

STTIAD

Saint Thomas Island Cyril E King

Sat 10/17

4:45 pm-8:50 pm

Nonstop4h 05m

Washington, D.C. Dulles Intl

Sat 11/7

6:00 am-4:20 pm

1 stop9h 20m

$496

Saint Thomas IslandWashington, D.C.

STT Saint Thomas Island Cyril E King - IAD Washington, D.C. Dulles Intl

STTIAD

Saint Thomas Island Cyril E King

Wed 11/4

3:00 pm-7:25 am

2 stops17h 25m

Washington, D.C. Dulles Intl

Tue 11/10

1:15 pm-12:05 pm

2 stops21h 50m

$663

Saint Thomas IslandWashington, D.C.

STT Saint Thomas Island Cyril E King - IAD Washington, D.C. Dulles Intl

STTIAD

Saint Thomas Island Cyril E King

Sat 9/26

4:45 pm-8:50 pm

Nonstop4h 05m

Washington, D.C. Dulles Intl

Fri 10/2

10:18 pm-3:43 pm

1 stop17h 25m

$686

Saint Thomas IslandWashington, D.C.

STT Saint Thomas Island Cyril E King - IAD Washington, D.C. Dulles Intl

STTIAD

Saint Thomas Island Cyril E King

Fri 9/25

5:40 pm-8:47 pm

1 stop27h 07m

Washington, D.C. Dulles Intl

Sat 10/3

6:15 am-3:43 pm

1 stop9h 28m

$781

Saint Thomas IslandWashington, D.C.

STT Saint Thomas Island Cyril E King - IAD Washington, D.C. Dulles Intl

STTIAD

Saint Thomas Island Cyril E King

Sun 9/6

2:49 pm-12:34 am

1 stop9h 45m

Washington, D.C. Dulles Intl

Wed 9/16

6:00 am-1:42 pm

1 stop7h 42m

$786
Cheapest one-way
Quickest one-way

Saint Thomas IslandWashington, D.C.

STT Saint Thomas Island Cyril E King - IAD Washington, D.C. Dulles Intl

STTIAD

Saint Thomas Island Cyril E King

Sun 10/25

12:07 pm-4:30 pm

Nonstop4h 23m

$178

Saint Thomas IslandWashington, D.C.

STT Saint Thomas Island Cyril E King - IAD Washington, D.C. Dulles Intl

STTIAD

Saint Thomas Island Cyril E King

Fri 10/30

2:00 pm-9:27 pm

1 stop7h 27m

$182

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/15

Showing 1-10 of 17 resultsSorted by cheapest first
1
2
  • Most accurate provider: When it comes to deals on Saint Thomas Island-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Saint Thomas Island-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Saint Thomas Island-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Saint Thomas Island-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Saint Thomas Island-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Saint Thomas Island to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Saint Thomas Island with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Saint Thomas Island to Washington, D.C. Dulles Intl Airport

What is the cheapest time of day to fly from STT to IAD?

Find hourly flight availability from Saint Thomas Island to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 17, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Saint Thomas Island to Washington, D.C. Dulles Intl Airport as you normally would.

The best insider tips for Saint Thomas Island to Washington, D.C. Dulles Intl Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Saint Thomas Island to Washington, D.C. Dulles Intl Airport trip
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on STT

Mark Chesnut is a travel writer and public speaker with more than 30 years of experience. The 2019 winner of the NLGJA Excellence in Travel Writing Award, Mark is the author of the book “Prepare for Departure” and has covered air travel for multiple top consumer and trade media outlets.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on IAD

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated August 17, 2026.
Read reviews from past customers who have flown United Airlines from Saint Thomas Island to Washington, D.C. Dulles Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,106 reviews

Crew

8.1

Food

6.7

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
10,106 reviews
United Airlines
7.4
Good
10,106 reviews

Crew

8.1

Food

6.7

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Saint Thomas Island to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Saint Thomas Island to Washington, D.C. Dulles Intl?

    Most people fly from Saint Thomas Island Cyril E King (STT) if they book a flight from Saint Thomas Island to Washington, D.C. Dulles Intl. On average, Cyril E King has 0 outbound flights to Washington, D.C. Dulles Intl per day from 1 airline. Saint Thomas Island Cyril E King is conveniently located just 2.8 mi from Saint Thomas Island’s city center.

  • How long is the flight from Saint Thomas Island to Washington, D.C. Dulles Intl Airport?

    A quick flight from Saint Thomas Island to Washington, D.C. Dulles Intl Airport can take about 4h 23m. United Airlines provides one of the quickest options available for as low as $351. There are 1608 mi between Saint Thomas Island and Washington, D.C. Dulles Intl Airport. Generally, flights for this route are nonstop.

  • What is the cheapest airline to fly from Saint Thomas Island to Washington, D.C. Dulles Intl Airport round-trip?

    Flying on United Airlines is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at $261. United Airlines is currently priced 52% below the average price you’ll pay for this route.

  • What are the cheapest flights from Saint Thomas Island to Washington, D.C. Dulles Intl Airport?

    While on average a flight from Saint Thomas Island to Washington, D.C. Dulles Intl Airport is generally $1,034, our data shows the cheapest flight currently is $152. When looking at the most popular route, (Saint Thomas Island Cyril E King - Washington, D.C. Dulles Intl), you can expect to pay $351 for that flight.

  • Can I find deals for flights from Saint Thomas Island to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Saint Thomas Island to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Saint Thomas Island to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Saint Thomas Island to Dulles Intl.

  • Can I find deals for business class flights from Saint Thomas Island to Dulles Intl?

    Yes. Cheapflights offers flight deals from Saint Thomas Island to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Owings Mills
Arlington
Tysons
Springfield
Lanham
Reston
Herndon
Rockville
Chantilly
Hyattsville
Fredericksburg
Falls Church
Hanover
Laurel
Sterling
Oxon Hill
Clinton
Hunt Valley
Woodbridge

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Alternative routes for Saint Thomas Island to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Saint Thomas Island to Baltimore flights

Top airline flying from Saint Thomas Island to Dulles Intl

Discover the top airline that operate flights from Saint Thomas Island to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$261Average$491FlexibilityNo cancel feeOn-time69%

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