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.

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

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).

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.

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).

Most accurate provider : When it comes to deals on Saint Thomas Island-Washington, D.C. Dulles Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Saint Thomas Island-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

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.

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.

$97+ Flights from Saint Thomas Island to Washington, D.C. Dulles Intl Airport

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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 December 12, 2025.

Thu 12/181:02 pmSTT - IAD

Nonstop4h 23mUnited Airlines

Thu 12/256:30 amIAD - STT

1 stop8h 48mUnited Airlines

Deal found 12/11

$345

Mon 12/151:02 pmSTT - IAD

Nonstop4h 23mUnited Airlines

Wed 12/1710:35 pmIAD - STT

1 stop16h 43mUnited Airlines

Deal found 12/11

$986

Mon 12/155:29 pmSTT - IAD

1 stop6h 39mAmerican Airlines

Wed 12/177:55 amIAD - STT

1 stop7h 53mAmerican Airlines

Deal found 12/11

$1,019

Tue 12/161:02 pmSTT - IAD

Nonstop4h 23mUnited Airlines

Fri 12/196:30 amIAD - STT

1 stop8h 48mUnited Airlines

Deal found 12/9

$1,026

Mon 12/153:54 pmSTT - IAD

3 stops20h 29mMultiple Airlines

Wed 12/175:40 pmIAD - STT

3 stops19h 48mMultiple Airlines

Deal found 12/11

$1,060

Tue 12/165:29 pmSTT - IAD

1 stop6h 39mAmerican Airlines

Fri 12/196:35 amIAD - STT

1 stop8h 17mAmerican Airlines

Deal found 12/10

$1,080

Best flights from Saint Thomas Island to Dulles Intl
Discover carefully curated flight deals from Saint Thomas Island to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

Thu 2/195:32 pmSTT - IAD

1 stop16h 11mAmerican Airlines

Mon 2/236:34 amIAD - STT

1 stop8h 15mAmerican Airlines

Deal found 12/10

$189

Wed 1/281:02 pmSTT - IAD

Nonstop4h 23mUnited Airlines

Wed 2/48:59 amIAD - STT

Nonstop3h 57mUnited Airlines

Deal found 12/10

$280

Wed 1/284:15 pmSTT - IAD

1 stop9h 09mDelta

Wed 2/46:00 amIAD - STT

1 stop8h 05mDelta

Deal found 12/10

$333

Thu 4/232:10 pmSTT - IAD

1 stop10h 02mUnited Airlines

Thu 4/306:00 amIAD - STT

1 stop9h 43mUnited Airlines

Deal found 12/10

$307

Thu 2/191:02 pmSTT - IAD

Nonstop4h 23mUnited Airlines

Mon 2/238:59 amIAD - STT

Nonstop3h 57mUnited Airlines

Deal found 12/10

$311

Fri 2/65:25 pmSTT - IAD

1 stop6h 53mUnited Airlines

Sun 2/88:59 amIAD - STT

Nonstop3h 57mUnited Airlines

Deal found 12/9

$317

Thu 1/295:25 pmSTT - IAD

1 stop6h 53mUnited Airlines

Thu 2/58:59 amIAD - STT

Nonstop3h 57mUnited Airlines

Deal found 12/10

$373

Last-minute flights from Saint Thomas Island to Dulles Intl
Discover last-minute flight deals from Saint Thomas Island to Dulles Intl. Data last updated December 12, 2025 and is based on user searches.

Thu 12/181:02 pmSTT - IAD

Nonstop4h 23mUnited Airlines

Thu 12/256:30 amIAD - STT

1 stop8h 48mUnited Airlines

Deal found 12/11

$345

Wed 1/73:23 pmSTT - IAD

3 stops25h 00mMultiple Airlines

Wed 1/145:40 pmIAD - STT

3 stops20h 12mMultiple Airlines

Deal found 12/10

$511

Wed 1/281:02 pmSTT - IAD

Nonstop4h 23mUnited Airlines

Wed 2/48:59 amIAD - STT

Nonstop3h 57mUnited Airlines

Deal found 12/10

$280

Wed 1/284:15 pmSTT - IAD

1 stop9h 09mDelta

Wed 2/46:00 amIAD - STT

1 stop8h 05mDelta

Deal found 12/10

$333

Thu 1/295:25 pmSTT - IAD

1 stop6h 53mUnited Airlines

Thu 2/58:59 amIAD - STT

Nonstop3h 57mUnited Airlines

Deal found 12/11

$373

Thu 1/293:46 pmSTT - IAD

1 stop8h 26mAmerican Airlines

Thu 2/57:01 amIAD - STT

1 stop7h 05mAmerican Airlines

Deal found 12/11

$404

One-way flights from Saint Thomas Island to Dulles Intl
Search for one-way flight options from Saint Thomas Island to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated December 12, 2025.

Wed 1/144:12 pmSTT - IAD

1 stop8h 00mAmerican Airlines

Deal found 12/10

$97

Wed 1/215:25 pmSTT - IAD

1 stop6h 53mUnited Airlines

Deal found 12/10

$102

Wed 12/175:29 pmSTT - IAD

1 stop6h 39mAmerican Airlines

Deal found 12/10

$129

Thu 1/83:57 pmSTT - IAD

1 stop16h 58mMultiple Airlines

Deal found 12/10

$161

Wed 1/712:31 pmSTT - IAD

2 stops26h 55mMultiple Airlines

Deal found 12/10

$169

Sun 1/253:57 pmSTT - IAD

1 stop21h 39mMultiple Airlines

Deal found 12/11

$170

Thu 4/22:10 pmSTT - IAD

1 stop10h 02mUnited Airlines

Deal found 12/10

$172

Mon 1/124:25 pmSTT - IAD

1 stop8h 12mDelta

Deal found 12/9

$197

Find flight deals from Saint Thomas Island to Dulles Intl

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$189 (American Airlines)
One-way from	$97 (American Airlines)
Popular in	June
Cheapest in	August
Average price	$487
Good round-trip deal	$437 or less
Good one-way deal	$251 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. 20% potential increase in price ($142 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease ($34 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

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

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

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Thu 2/19

5:32 pm-8:43 am

1 stop16h 11m

Washington, D.C. Dulles Intl

Mon 2/23

6:34 am-3:49 pm

1 stop8h 15m

$189

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Wed 1/28

1:02 pm-4:25 pm

Nonstop4h 23m

Washington, D.C. Dulles Intl

Wed 2/4

8:59 am-1:56 pm

Nonstop3h 57m

$280

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Thu 4/23

2:10 pm-12:12 am

1 stop10h 02m

Washington, D.C. Dulles Intl

Thu 4/30

6:00 am-3:43 pm

1 stop9h 43m

$307

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Thu 2/19

1:02 pm-4:25 pm

Nonstop4h 23m

Washington, D.C. Dulles Intl

Mon 2/23

8:59 am-1:56 pm

Nonstop3h 57m

$311

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Fri 2/6

5:25 pm-11:18 pm

1 stop6h 53m

Washington, D.C. Dulles Intl

Sun 2/8

8:59 am-1:56 pm

Nonstop3h 57m

$317

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Wed 1/28

4:15 pm-12:24 am

1 stop9h 09m

Washington, D.C. Dulles Intl

Wed 2/4

6:00 am-3:05 pm

1 stop8h 05m

$333

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Thu 1/29

5:25 pm-11:18 pm

1 stop6h 53m

Washington, D.C. Dulles Intl

Thu 2/5

8:59 am-1:56 pm

Nonstop3h 57m

$373

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Wed 12/17

5:29 pm-11:08 pm

1 stop6h 39m

$129

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Thu 1/8

3:57 pm-7:55 am

1 stop16h 58m

$161

Saint Thomas IslandWashington, D.C.

STT - IAD

STTIAD

Saint Thomas Island Cyril E King

Wed 1/7

12:31 pm-2:26 pm

2 stops26h 55m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 13 results

Compare providers for flights from Saint Thomas Island to Dulles Intl

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Saint Thomas Island to Dulles Intl in December.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust 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 Saint Thomas Island-Washington, D.C. Dulles Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Saint Thomas Island-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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

Prices

Airlines

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

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

Cheapflights partnered with top experts to bring you the best recommendations for your Saint Thomas Island to Washington, D.C. Dulles Intl Airport trip

Airports

STT

Expect quick screening times at STT with easy check-in and departure, making it convenient for travelers heading to Washington Dulles.

IAD

The Washington Metro Silver line reaches IAD in under 40 minutes, offering a cheap way to get to the city from the airport.

Our travel experts

Mark Chesnut

Expert on STT

Ramsey Qubein

Expert on IAD

Reviews of airlines servicing Dulles Intl

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

9,095 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).

United Airlines

7.4

Good

9,095 reviews

United Airlines

7.4

Good

9,095 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).

Related info for your journey

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. American Airlines provides one of the quickest options available for as low as $280. There are 1608 mi between Saint Thomas Island and Washington, D.C. Dulles Intl Airport. Both multi-stop and nonstop flights can be found to your destination and back.
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 $3,018, our data shows the cheapest flight currently is $149. When looking at the most popular route, (Saint Thomas Island Cyril E King - Washington, D.C. Dulles Intl), you can expect to pay $280 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.

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Top airline flying from Saint Thomas Island to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$298	Average$680	FlexibilityNo cancel fee	On-time69%

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$97+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.

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

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Cheap flight deals from Saint Thomas Island to Dulles Intl

Cheapest flights from Saint Thomas Island to Dulles IntlExplore 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 December 12, 2025.

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 December 12, 2025.

Find flight deals from Saint Thomas Island to Dulles Intl

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

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.

Compare providers for flights from Saint Thomas Island to Dulles Intl

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 Saint Thomas Island to Dulles Intl in December.

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.

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?

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

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

Airports

STT

IAD

Our travel experts

Reviews of airlines servicing Dulles Intl

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.

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?

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

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

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

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

How can I 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?

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

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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.

Top airline flying from Saint Thomas Island to Dulles Intl

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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 December 12, 2025.