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Dulles Intl

$172+ Cheap flights from Saint Thomas Island (STT) to Dulles Intl (IAD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
STT — IAD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap 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 June 12, 2025.

Round-trip from

$172
(Priceline)

Popular in

November

Cheapest in

September

Average price

$720

Good round-trip deal

$509 or less

Good one-way deal

$297 or less
From Saint Thomas Island Cyril E King to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 5% potential increase in price ($34 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Saint Thomas Island Cyril E King to Washington, D.C. Dulles Intl.
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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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Find 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 June 12, 2025.

This Priceline deal was found by Cheapflights users on 6/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/145:14 pmSTT - IAD
1 stop18h 42mFrontier
Sun 7/2012:24 pmIAD - STT
1 stop28h 05mFrontier
Deal found 6/11$172
This Mytrip deal was found by Cheapflights users on 6/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/174:05 pmSTT - IAD
2 stops22h 18mMultiple Airlines
Sun 7/2711:58 amIAD - STT
2 stops24h 32mMultiple Airlines
Deal found 6/12$391
This United Airlines deal was found by Cheapflights users on 6/10. 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 11/61:02 pmSTT - IAD
Nonstop4h 23mUnited Airlines
Tue 11/118:15 amIAD - STT
Nonstop3h 57mUnited Airlines
Deal found 6/10$460
This American Airlines deal was found by Cheapflights users on 6/10. 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 11/512:35 pmSTT - IAD
1 stop7h 56mAmerican Airlines
Tue 11/115:03 amIAD - STT
1 stop9h 45mAmerican Airlines
Deal found 6/10$469
This Delta deal was found by Cheapflights users on 6/11. 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.
Sat 9/202:49 pmSTT - IAD
1 stop8h 28mDelta
Sat 10/46:30 amIAD - STT
1 stop8h 10mDelta
Deal found 6/11$562

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 June 12, 2025.
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

Mon 7/14

5:14 pm-11:56 am

1 stop18h 42m

Washington, D.C. Dulles Intl

Sun 7/20

12:24 pm-4:29 pm

1 stop28h 05m

$172

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Thu 7/17

4:05 pm-2:23 pm

2 stops22h 18m

Washington, D.C. Dulles Intl

Sun 7/27

11:58 am-12:30 pm

2 stops24h 32m

$391

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Thu 11/6

1:02 pm-4:25 pm

Nonstop4h 23m

Washington, D.C. Dulles Intl

Tue 11/11

8:15 am-1:12 pm

Nonstop3h 57m

$460

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Wed 11/5

12:35 pm-7:31 pm

1 stop7h 56m

Washington, D.C. Dulles Intl

Tue 11/11

5:03 am-3:48 pm

1 stop9h 45m

$469

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Sat 9/20

2:49 pm-11:17 pm

1 stop8h 28m

Washington, D.C. Dulles Intl

Sat 10/4

6:30 am-2:40 pm

1 stop8h 10m

$562

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Sat 7/12

10:43 am-11:08 am

2 stops24h 25m

$187

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Tue 7/29

4:45 pm-8:57 pm

Nonstop4h 12m

$272

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Wed 10/8

1:24 pm-12:02 am

1 stop10h 38m

$277

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Thu 7/10

1:27 pm-12:34 am

1 stop11h 07m

$322

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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 June 12, 2025.

It’s typically best to fly out from Saint Thomas Island to Washington, D.C. Dulles Intl Airport in the morning. Doing so could potentially save you 15% on the flight price compared to flying in the afternoon, which is usually more expensive.

Weekly flight availability from Saint Thomas Island to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Saint Thomas Island to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 12, 2025.

The most flights from STT to IAD are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 June 12, 2025.
To help decide which airline to fly from Saint Thomas Island to Washington, D.C., see what other customers have to say about Delta, United Airlines and American Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Frontier
5.9
Fair
3,295 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    Flying on Frontier is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at $172. Additional round-trip tickets that might be worth considering are offered by United Airlines and American Airlines, with the lowest prices starting at $460 and $469, respectively. Frontier is currently priced 73% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Saint Thomas Island to Washington, D.C. Dulles Intl Airport one-way?

    One-way options have recently been found by users for as low as $272 on United Airlines. Other airlines that offer cheap prices include American Airlines from $277 and Delta from $322 one-way.

  • 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 $3,596, our data shows the cheapest flight currently is $134. When looking at the most popular route, (Saint Thomas Island Cyril E King - Washington, D.C. Dulles Intl), you can expect to pay $440 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.

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

    Currently, August is the cheapest month in which you can book a flight from Saint Thomas Island to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Saint Thomas Island to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $349). 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
Arlington
Alexandria
Woodbridge
Tysons
Silver Spring
Linthicum Heights
Fredericksburg
Gaithersburg
Fairfax
Falls Church
Easton
Herndon
Towson
Sterling
Bowie
Rockville
Reston
National Harbor
Springfield
Manassas

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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
Saint Thomas Island to Reagan-National flights
Christiansted to Reagan-National flights
Christiansted to Dulles Intl flights
Christiansted 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$755FlexibilityNo cancel feeOn-time69%

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