HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$107+ 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 3/27. Fares are subject to change and may not be available on all flights or dates of travel.
STT — IAD
Mar 20 — Mar 271
Fri 3/20
Fri 3/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Saint Thomas Island to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 February 18, 2026.

This United Airlines deal was found by Cheapflights users on 2/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1812:02 pm
STT
-
IAD
Nonstop4h 23m
United Airlines
Wed 3/258:59 am
IAD
-
STT
Nonstop3h 57m
United Airlines
Deal found 2/16$201
This United Airlines deal was found by Cheapflights users on 2/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/142:10 pm
STT
-
IAD
1 stop10h 05m
United Airlines
Mon 4/206:00 am
IAD
-
STT
1 stop7h 08m
United Airlines
Deal found 2/16$210
This American Airlines deal was found by Cheapflights users on 2/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/31:41 pm
STT
-
IAD
1 stop7h 49m
American Airlines
Tue 3/105:00 am
IAD
-
STT
1 stop7h 05m
American Airlines
Deal found 2/17$231
This United Airlines deal was found by Cheapflights users on 2/17. 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.
Wed 3/41:02 pm
STT
-
IAD
Nonstop4h 23m
United Airlines
Sun 3/86:15 am
IAD
-
STT
1 stop9h 03m
United Airlines
Deal found 2/17$248
This American Airlines deal was found by Cheapflights users on 2/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/45:22 pm
STT
-
IAD
1 stop16h 26m
American Airlines
Sun 3/86:00 am
IAD
-
STT
1 stop10h 02m
American Airlines
Deal found 2/17$252
This United Airlines deal was found by Cheapflights users on 2/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/271:02 pm
STT
-
IAD
Nonstop4h 23m
United Airlines
Wed 3/48:59 am
IAD
-
STT
Nonstop3h 57m
United Airlines
Deal found 2/16$254
This United Airlines deal was found by Cheapflights users on 2/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/265:25 pm
STT
-
IAD
1 stop6h 56m
United Airlines
Thu 3/58:59 am
IAD
-
STT
Nonstop3h 57m
United Airlines
Deal found 2/16$259
This Delta deal was found by Cheapflights users on 2/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/271:50 pm
STT
-
IAD
1 stop11h 31m
Delta
Tue 3/37:15 am
IAD
-
STT
1 stop6h 49m
Delta
Deal found 2/17$263
This United Airlines deal was found by Cheapflights users on 2/17. 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.
Fri 2/271:02 pm
STT
-
IAD
Nonstop4h 23m
United Airlines
Tue 3/38:59 am
IAD
-
STT
Nonstop3h 57m
United Airlines
Deal found 2/17$274

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 February 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$201
(United Airlines)

One-way from

$107
(American Airlines)

Popular in

June

Cheapest in

February

Average price

$271

Good round-trip deal

$405 or less

Good one-way deal

$357 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. 22% potential increase in price ($161 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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.
Search Deals

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 February 18, 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

Saint Thomas Island

Fly to

Dulles Intl

Route

Depart

Return

Price

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Wed 3/18

12:02 pm-4:25 pm

Nonstop4h 23m

Washington, D.C. Dulles Intl

Wed 3/25

8:59 am-12:56 pm

Nonstop3h 57m

$201

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Tue 4/14

2:10 pm-12:15 am

1 stop10h 05m

Washington, D.C. Dulles Intl

Mon 4/20

8:15 am-12:20 pm

Nonstop4h 05m

$206

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Wed 3/4

1:02 pm-4:25 pm

Nonstop4h 23m

Washington, D.C. Dulles Intl

Sun 3/8

6:15 am-3:18 pm

1 stop9h 03m

$248

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Fri 2/27

1:02 pm-4:25 pm

Nonstop4h 23m

Washington, D.C. Dulles Intl

Tue 3/3

8:59 am-1:56 pm

Nonstop3h 57m

$254

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Fri 2/27

1:02 pm-4:25 pm

Nonstop4h 23m

Washington, D.C. Dulles Intl

Wed 3/4

8:59 am-1:56 pm

Nonstop3h 57m

$254

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Fri 2/27

4:15 pm-12:21 am

1 stop9h 06m

Washington, D.C. Dulles Intl

Wed 3/4

6:00 am-4:22 pm

1 stop9h 22m

$263

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Fri 2/27

1:50 pm-12:21 am

1 stop11h 31m

Washington, D.C. Dulles Intl

Tue 3/3

7:15 am-3:04 pm

1 stop6h 49m

$263

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Wed 3/18

12:49 pm-8:46 pm

1 stop7h 57m

Washington, D.C. Dulles Intl

Wed 3/25

6:01 am-1:47 pm

1 stop7h 46m

$284

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Fri 3/27

4:25 pm-11:19 pm

1 stop6h 54m

$107

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Thu 3/5

1:02 pm-4:25 pm

Nonstop4h 23m

$124

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/16

Showing 1-10 of 16 results
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 February 18, 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 February 18, 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
9,314 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,314 reviews
United Airlines
7.4
Good
9,314 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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 1 outbound flight 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 $201. 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 $298.

  • 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 $3,694, our data shows the cheapest flight currently is $145. When looking at the most popular route, (Saint Thomas Island Cyril E King - Washington, D.C. Dulles Intl), you can expect to pay $206 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
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Laurel
Rockville
Upper Marlboro
Linthicum Heights
Manassas
Bowie
Largo
McLean
Clinton
Towson

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Christiansted to Dulles Intl flights
Saint Thomas Island to Reagan-National flights
Christiansted to Baltimore flights
Christiansted to Reagan-National 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 February 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$298Average$646FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights