HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Saint Thomas Island

$133+ Cheap flights from Dulles Intl (IAD) to Saint Thomas Island (STT)

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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — STT
Aug 29 — Sep 51
Sat 8/29
Sat 9/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Saint Thomas Island 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.
Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Saint Thomas Island Cyril E King are usually found in February or April, booked 19 days in advance, depart on a Tuesday or Sunday and return on a Friday

Cheap flight deals from Dulles Intl to Saint Thomas Island

Cheapest flights from Dulles Intl to Saint Thomas Island
Explore the most affordable flight options available from Dulles Intl to Saint Thomas Island. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2026.

This Delta deal was found by Cheapflights users on 7/29. 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.
Sun 8/306:00 am
IAD
-
STT
1 stop7h 34m
Delta
Sat 9/54:13 pm
STT
-
IAD
1 stop8h 21m
Delta
Deal found 7/29$361
This United Airlines deal was found by Cheapflights users on 7/25. 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 11/248:56 am
IAD
-
STT
Nonstop4h 00m
United Airlines
Thu 12/31:02 pm
STT
-
IAD
Nonstop4h 23m
United Airlines
Deal found 7/25$371
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Sun 12/66:20 am
IAD
-
STT
1 stop8h 58m
United Airlines
Thu 12/101:02 pm
STT
-
IAD
Nonstop4h 23m
United Airlines
Deal found 7/26$374
This Delta deal was found by Cheapflights users on 7/25. 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.
Sun 8/306:00 am
IAD
-
STT
1 stop7h 34m
Delta
Fri 9/42:49 pm
STT
-
IAD
1 stop9h 45m
Delta
Deal found 7/25$395
This Delta deal was found by Cheapflights users on 7/29. 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.
Mon 8/316:00 am
IAD
-
STT
1 stop7h 34m
Delta
Fri 9/42:49 pm
STT
-
IAD
1 stop9h 45m
Delta
Deal found 7/29$423
This United Airlines deal was found by Cheapflights users on 7/28. 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 10/288:56 am
IAD
-
STT
Nonstop4h 00m
United Airlines
Tue 11/33:00 pm
STT
-
IAD
1 stop7h 27m
United Airlines
Deal found 7/28$430
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Mon 11/168:56 am
IAD
-
STT
Nonstop4h 00m
United Airlines
Fri 11/201:07 pm
STT
-
IAD
Nonstop4h 23m
United Airlines
Deal found 7/29$433
This United Airlines deal was found by Cheapflights users on 7/28. 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 10/249:00 am
IAD
-
STT
Nonstop3h 58m
United Airlines
Sat 10/312:35 pm
STT
-
IAD
1 stop10h 02m
United Airlines
Deal found 7/28$434
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Sun 12/138:59 am
IAD
-
STT
Nonstop3h 57m
United Airlines
Tue 12/223:00 pm
STT
-
IAD
1 stop10h 25m
United Airlines
Deal found 7/25$435
This United Airlines deal was found by Cheapflights users on 7/28. 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 10/318:56 am
IAD
-
STT
Nonstop4h 00m
United Airlines
Wed 11/43:00 pm
STT
-
IAD
1 stop7h 27m
United Airlines
Deal found 7/28$438
This Delta deal was found by Cheapflights users on 7/29. 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 8/286:00 am
IAD
-
STT
1 stop7h 34m
Delta
Sat 9/54:13 pm
STT
-
IAD
1 stop8h 21m
Delta
Deal found 7/29$444

Find flight deals from Dulles Intl to Saint Thomas Island

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Saint Thomas Island (STT). 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 July 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$361
(Delta)

One-way from

$133
(Delta)

Popular in

June

Cheapest in

February

Average price

$576

Good round-trip deal

$550 or less

Good one-way deal

$190 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Saint Thomas Island Cyril E King flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Saint Thomas Island Cyril E King flights.
Search Deals
From Washington, D.C. Dulles Intl to Saint Thomas Island Cyril E King
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Saint Thomas Island Cyril E King
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Saint Thomas Island Cyril E King.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Saint Thomas Island Cyril E King.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Saint Thomas Island 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 July 30, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Tue 9/1

6:00 am-1:34 pm

1 stop7h 34m

Saint Thomas Island Cyril E King

Sat 9/5

4:13 pm-12:34 am

1 stop8h 21m

$361

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Sat 9/12

8:35 am-3:43 pm

1 stop7h 08m

Saint Thomas Island Cyril E King

Sat 9/19

4:45 pm-8:50 pm

Nonstop4h 05m

$491

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Wed 10/21

8:40 am-7:50 am

1 stop23h 10m

Saint Thomas Island Cyril E King

Sun 10/25

12:07 pm-4:30 pm

Nonstop4h 23m

$620

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Fri 10/2

10:18 pm-3:43 pm

1 stop17h 25m

Saint Thomas Island Cyril E King

Sat 10/10

12:09 pm-10:30 pm

1 stop10h 21m

$630
Quickest round-trip

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Sat 8/22

9:00 am-12:58 pm

Nonstop3h 58m

Saint Thomas Island Cyril E King

Sat 8/29

4:45 pm-8:50 pm

Nonstop4h 05m

$638

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Sat 10/24

5:20 pm-11:05 am

2 stops17h 45m

Saint Thomas Island Cyril E King

Sat 10/31

2:35 pm-12:37 am

1 stop10h 02m

$670

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Sat 8/29

8:20 am-3:43 pm

1 stop7h 23m

Saint Thomas Island Cyril E King

Sat 9/5

2:10 pm-9:28 pm

1 stop7h 18m

$691

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Sun 8/23

6:00 am-1:34 pm

1 stop7h 34m

Saint Thomas Island Cyril E King

Sat 8/29

4:13 pm-12:34 am

1 stop8h 21m

$736

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Wed 8/26

6:16 am-7:20 pm

2 stops13h 04m

Saint Thomas Island Cyril E King

Sun 8/30

5:40 pm-7:19 am

2 stops13h 39m

$873

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Wed 10/21

6:00 am-1:37 pm

1 stop7h 37m

Saint Thomas Island Cyril E King

Sun 10/25

2:47 pm-12:42 am

1 stop9h 55m

$884

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Compare providers for flights from Dulles Intl to Saint Thomas Island

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Saint Thomas Island in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Saint Thomas Island flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Saint Thomas Island flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Saint Thomas Island flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Saint Thomas Island 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 Washington, D.C. Dulles Intl Airport-Saint Thomas Island 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 Dulles Intl to Saint Thomas Island

Have a flexible travel schedule? Discover the best time to fly to Saint Thomas Island from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Saint Thomas Island

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island, you should look to book at least 18 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island (average of $369). Flying from Washington, D.C. Dulles Intl Airport to Saint Thomas Island in June is currently the most expensive (average of $694). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Dulles Intl to Saint Thomas Island. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 30, 2026.

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

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

Airfare is below average for this route at the moment.

Washington, D.C. Dulles Intl Airport to Saint Thomas Island flights typically cost between $523 and $724 in January.
The cheapest round-trip price found within the last 5 days was $340 on Delta (Jan 18-Jan 27).

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

Get insights into the airlines that provide service to Saint Thomas Island. 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 Saint Thomas Island. Reviews last updated July 30, 2026.
Read reviews from past customers who have flown Delta,United Airlines, andAmerican Airlines from Washington, D.C. Dulles Intl Airport to Saint Thomas Island. 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.
Delta
7.8
Good
8,489 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,489 reviews
Delta
7.8
Good
8,489 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
10,047 reviews
Delta
7.8
Good
8,489 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,842 reviews
Delta
7.8
Good
8,489 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
JetBlue
7.1
Good
3,028 reviews
Delta
7.8
Good
8,489 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Saint Thomas Island. 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 into for flights to Saint Thomas Island from Washington, D.C. Dulles Intl?

    For a flight from Washington, D.C. Dulles Intl to Saint Thomas Island, you will be flying into Cyril E King. Saint Thomas Island Cyril E King (STT) is just 2.8 mi from the center of the city. Cyril E King is the only Saint Thomas Island airport and it handles 0 inbound flights from Washington, D.C. Dulles Intl per day. 4 airlines have flights to Saint Thomas Island Cyril E King from Washington, D.C. Dulles Intl on a regular basis.

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

    Delta and United Airlines can get you from Washington, D.C. Dulles Intl Airport to Saint Thomas Island in just under 7h 08m. Your travel time can differ by up to 26m. Airlines will cover a distance of 1608 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Saint Thomas Island round-trip?

    Flying on American Airlines is currently your cheapest option to Saint Thomas Island, with prices starting at $190. Additional round-trip tickets that might be worth considering are offered by JetBlue and Delta, with the lowest prices starting at $197 and $220, respectively. Users have found that American Airlines is 65% cheaper than the other options available to this destination.

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

    Looking for the cheapest flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island? While on average our users pay $902, our data indicates the cheapest price to be $134. The most popular route (Washington, D.C. Dulles Intl - Saint Thomas Island Cyril E King), is priced around $331.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island (average of $369). Flying from Washington, D.C. Dulles Intl Airport to Saint Thomas Island in June is currently the most expensive (average of $694). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Saint Thomas Island?

Book flights to Saint Thomas Island if you plan to visit one of these locations
St. John

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 Dulles Intl to Saint Thomas Island

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

Top 4 airlines flying from Dulles Intl to Saint Thomas Island

Discover the top 4 airlines that operate flights from Dulles Intl to Saint Thomas Island. 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 July 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$190Average$424FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$197Average$327FlexibilityNo cancel feeOn-time62%
DeltaCheapest$220Average$525FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$239Average$548FlexibilityNo 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