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Saint Thomas Island

$145+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — STT
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Saint Thomas Island Cyril E King are usually found in September or July, booked 6 days in advance, depart on a Tuesday or Thursday and return on a Friday

Find 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 October 16, 2025.

This United Airlines deal was found by Cheapflights users on 10/16. 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 11/288:15 amIAD - STT
Nonstop3h 57mUnited Airlines
Fri 12/51:02 pmSTT - IAD
Nonstop4h 23mUnited Airlines
Deal found 10/16$384
This United Airlines deal was found by Cheapflights users on 10/16. 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.
Sun 11/308:59 amIAD - STT
Nonstop3h 57mUnited Airlines
Tue 12/91:02 pmSTT - IAD
Nonstop4h 23mUnited Airlines
Deal found 10/16$387
This Kiwi.com deal was found by Cheapflights users on 10/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/125:45 amIAD - STT
2 stops29h 11mMultiple Airlines
Sun 12/213:23 pmSTT - IAD
1 stop30h 50mMultiple Airlines
Deal found 10/16$398
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Fri 12/128:15 amIAD - STT
Nonstop3h 57mUnited Airlines
Sun 12/211:02 pmSTT - IAD
Nonstop4h 23mUnited Airlines
Deal found 10/15$400
This United Airlines deal was found by Cheapflights users on 10/16. 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.
Sun 12/78:59 amIAD - STT
Nonstop3h 57mUnited Airlines
Tue 12/161:02 pmSTT - IAD
Nonstop4h 23mUnited Airlines
Deal found 10/16$403
This United Airlines deal was found by Cheapflights users on 10/15. 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 12/38:15 amIAD - STT
Nonstop3h 57mUnited Airlines
Wed 12/102:15 pmSTT - IAD
1 stop8h 06mUnited Airlines
Deal found 10/15$405
This American Airlines deal was found by Cheapflights users on 10/16. 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 11/158:09 pmIAD - STT
1 stop14h 34mAmerican Airlines
Sat 11/222:40 pmSTT - IAD
1 stop10h 19mAmerican Airlines
Deal found 10/16$411
This Kiwi.com deal was found by Cheapflights users on 10/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/318:36 pmIAD - STT
1 stop16h 23mMultiple Airlines
Tue 11/41:55 pmSTT - IAD
2 stops31h 25mMultiple Airlines
Deal found 10/16$415
This United Airlines deal was found by Cheapflights users on 10/15. 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 11/128:15 amIAD - STT
Nonstop3h 57mUnited Airlines
Wed 11/192:15 pmSTT - IAD
1 stop7h 42mUnited Airlines
Deal found 10/15$424
This United Airlines deal was found by Cheapflights users on 10/16. 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.
Mon 11/38:15 amIAD - STT
Nonstop3h 57mUnited Airlines
Thu 11/61:02 pmSTT - IAD
Nonstop4h 23mUnited Airlines
Deal found 10/16$425
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/298:40 amIAD - STT
1 stop28h 50mMultiple Airlines
Sat 12/63:54 pmSTT - IAD
1 stop29h 30mMultiple Airlines
Deal found 10/15$429

Cheap 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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$381
(Delta)

One-way from

$145
(United Airlines)

Popular in

March

Cheapest in

September

Average price

$587

Good round-trip deal

$485 or less

Good one-way deal

$358 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. 17% potential increase in price ($145 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 16, 2025.
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

Dulles Intl

Fly to

Saint Thomas Island

Route

Depart

Return

Price

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Fri 12/12

8:15 am-1:12 pm

Nonstop3h 57m

Saint Thomas Island Cyril E King

Sun 12/21

1:02 pm-4:25 pm

Nonstop4h 23m

$400

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Tue 3/10

6:00 am-1:55 pm

1 stop7h 55m

Saint Thomas Island Cyril E King

Wed 3/11

2:00 pm-9:13 pm

1 stop7h 13m

$409

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Tue 2/24

7:00 am-2:55 pm

1 stop6h 55m

Saint Thomas Island Cyril E King

Wed 3/4

3:00 pm-9:13 pm

1 stop7h 13m

$409

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Thu 3/5

6:25 am-4:18 pm

1 stop8h 53m

Saint Thomas Island Cyril E King

Tue 3/10

2:35 pm-11:59 pm

1 stop9h 24m

$433

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Tue 1/27

6:00 am-3:54 pm

1 stop8h 54m

Saint Thomas Island Cyril E King

Tue 2/3

4:00 pm-12:07 am

1 stop9h 07m

$434

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Wed 4/8

7:00 am-2:51 pm

1 stop7h 51m

Saint Thomas Island Cyril E King

Wed 4/15

1:15 pm-9:16 pm

1 stop8h 01m

$434

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Sun 11/2

5:30 am-3:18 pm

1 stop8h 48m

Saint Thomas Island Cyril E King

Fri 11/7

1:02 pm-4:25 pm

Nonstop4h 23m

$454

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Wed 1/14

6:45 am-3:54 pm

1 stop8h 09m

Saint Thomas Island Cyril E King

Wed 1/21

4:00 pm-12:07 am

1 stop9h 07m

$458

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Sun 1/18

8:59 am-1:56 pm

Nonstop3h 57m

Saint Thomas Island Cyril E King

Sun 1/18

5:25 pm-11:18 pm

1 stop6h 53m

$467

Washington, D.C.Saint Thomas Island

IAD - STT

IADSTT

Washington, D.C. Dulles Intl

Fri 3/6

6:25 am-4:18 pm

1 stop8h 53m

Saint Thomas Island Cyril E King

Mon 3/9

2:35 pm-11:59 pm

1 stop9h 24m

$471

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/16

Showing 1-10 of 22 results
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice 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?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Saint Thomas Island. Price data was last updated on October 10, 2025.

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 6 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, July is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island (average of $323). Flying from Washington, D.C. Dulles Intl Airport to Saint Thomas Island in May is currently the most expensive (average of $507). 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 October 16, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 21% on flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island by exploring options for tickets at noon.

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Saint Thomas Island trip
Airports
IAD

For a smooth departure from IAD, use the Aerotrain to navigate between terminals efficiently, especially during busy afternoon hours.

Read more about IADby Ramsey Qubein
STT

Upon arrival at STT, rental car counters are conveniently located inside baggage claim for quick access while waiting for luggage.

Read more about STTby Mark Chesnut
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on STT

Mark Chesnut

Mark Chesnut

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

Ramsey Qubein

Ramsey Qubein

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 October 16, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and Spirit 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
7.9
Good
7,978 reviews

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,978 reviews
Delta
7.9
Good
7,978 reviews

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,982 reviews
Delta
7.9
Good
7,978 reviews

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Spirit Airlines
6.3
Okay
8,099 reviews
Delta
7.9
Good
7,978 reviews

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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. 3 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?

    United Airlines and Delta can get you from Washington, D.C. Dulles Intl Airport to Saint Thomas Island in just under 3h 57m. Your travel time can differ by up to 3h 58m. 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 Spirit Airlines is currently your cheapest option to Saint Thomas Island, with prices starting at $295. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $346 and $460, respectively. Users have found that Spirit Airlines is 57% 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 $837, our data indicates the cheapest price to be $312. The most popular route (Washington, D.C. Dulles Intl - Saint Thomas Island Cyril E King), is priced around $400.

  • 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, July is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island (average of $323). Flying from Washington, D.C. Dulles Intl Airport to Saint Thomas Island in May is currently the most expensive (average of $507). 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

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Alternative routes for Dulles Intl to Saint Thomas Island

See prices for flight routes from nearby airports that may be better suited for you.
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Reagan-National to Saint Thomas Island flights
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Reagan-National to Christiansted flights
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Top 3 airlines flying from Dulles Intl to Saint Thomas Island

Discover the top 3 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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$295Average$363FlexibilityNo cancel feeOn-time65%
DeltaCheapest$346Average$691FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$460Average$700FlexibilityNo cancel feeOn-time69%

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