IAD - STT

$93 Find Cheap Flights from Washington Dulles Airport to Saint Thomas Island

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Saint Thomas Island departing on 1/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Saint Thomas Island

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Saint Thomas Island, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Saint Thomas Island, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$285
Overall average: $576
United Airlines
Tue 1/20Fri 1/30
IAD - STT • Non-stop
Cheapest non-stop
$300
Typical prices: $458-$800
United Airlines
Tue 1/6Fri 1/16
IAD - STT • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Dulles features the AeroTrain for quick terminal transit.
Licensed taxis at STT have dome lights and 'TP' plates.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Delta
Cheapest • from $304 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 26% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 25% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Saint Thomas Island!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Dulles Intl to Saint Thomas Island (IAD-STT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Saint Thomas Island that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to Saint Thomas Island

Tue, Jan 20 - Fri, Jan 30
United Airlines Logo
8:59 am - 1:56 pm
IAD
-
STT
3h 57mnonstop
United Airlines Logo
5:25 pm - 11:18 pm
STT
-
IAD
6h 53m1 stop
$285United Airlines
Mon, May 4 - Wed, May 13
United Airlines Logo
6:00 am - 3:43 pm
IAD
-
STT
9h 43m1 stop
United Airlines Logo
1:22 pm - 10:49 pm
STT
-
IAD
9h 27m1 stop
$289United Airlines
Tue, Jan 6 - Fri, Jan 16
United Airlines Logo
8:59 am - 1:56 pm
IAD
-
STT
3h 57mnonstop
United Airlines Logo
1:02 pm - 4:25 pm
STT
-
IAD
4h 23mnonstop
$300United Airlines
Thu, Jan 22 - Wed, Jan 28
Delta Logo
6:00 am - 3:05 pm
IAD
-
STT
8h 05m1 stop
Delta Logo
4:15 pm - 12:24 am
STT
-
IAD
9h 09m1 stop
$304Delta
Wed, Feb 18 - Wed, Feb 25
United Airlines Logo
8:59 am - 1:56 pm
IAD
-
STT
3h 57mnonstop
United Airlines Logo
5:25 pm - 11:21 pm
STT
-
IAD
6h 56m1 stop
$305United Airlines
Wed, Feb 25 - Wed, Mar 4
United Airlines Logo
8:59 am - 1:56 pm
IAD
-
STT
3h 57mnonstop
United Airlines Logo
5:25 pm - 11:21 pm
STT
-
IAD
6h 56m1 stop
$309United Airlines
Mon, May 4 - Wed, May 6
United Airlines Logo
8:15 am - 12:20 pm
IAD
-
STT
4h 05mnonstop
United Airlines Logo
4:45 pm - 8:58 pm
STT
-
IAD
4h 13mnonstop
$312United Airlines
Sat, Jan 3 - Sat, Jan 10
Multiple Airlines Logo
10:15 pm - 2:28 pm
IAD
-
STT
15h 13m1 stop
Multiple Airlines Logo
3:57 pm - 7:40 am
STT
-
IAD
16h 43m1 stop
$313Multiple Airlines
Sat, May 9 - Mon, May 11
United Airlines Logo
6:00 am - 3:43 pm
IAD
-
STT
9h 43m1 stop
United Airlines Logo
4:45 pm - 8:58 pm
STT
-
IAD
4h 13mnonstop
$315United Airlines
Sat, Jan 31 - Fri, Feb 6
United Airlines Logo
8:59 am - 1:56 pm
IAD
-
STT
3h 57mnonstop
United Airlines Logo
5:25 pm - 11:18 pm
STT
-
IAD
6h 53m1 stop
$316United Airlines
Booking Insights

KAYAK's insights & trends for Dulles Intl to Saint Thomas Island flights

Get data-powered insights and trends into flights from Dulles Intl to Saint Thomas Island to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Washington Dulles Airport to Saint Thomas Island?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Saint Thomas Island on a Tuesday and more expensive on a Saturday. On your return trip to Washington Dulles Airport, you should consider flying back on a Friday, and avoid Mondays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island is September, where tickets cost $494 (return) on average. On the other hand, the most expensive months are April and February, where the average cost of round-trip tickets is $794 and $737 respectively.

Can I save money by flying with a layover from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $574, prices are generally cheapest when you fly direct.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island, you should book around 4 weeks before departure, which saves you about 26% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Expert advice

Expert advice for your flight from Dulles Intl to Saint Thomas Island

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
IAD

Dulles offers the AeroTrain and mobile lounges for quick transit between terminals. Plan your route in advance to save time.

STT

At STT, taxis with dome lights and 'TP' plates are licensed. Confirm rates before boarding to avoid surprises.

Our travel experts
Marisa Garcia

Marisa Garcia

Expert on STT

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on IAD

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more

Good to know

Low seasonSeptember
Cheapest flight$93
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly with an average 21% increase in price.
Flight from Washington Dulles Airport to Saint Thomas Island

When to book flights from Dulles Intl to Saint Thomas Island

Are your dates flexible? Find out the best times to travel from Dulles Intl to Saint Thomas Island based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington Dulles Airport to Saint Thomas Island flights

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island was $93 for a one-way ticket and $285 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Saint Thomas Island?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Washington Dulles Airport and on arrival in Saint Thomas Island.

  • Which airports will I be using when flying from Washington Dulles Airport to Saint Thomas Island?

    When flying out of Washington Dulles Airport you will be using Washington, D.C. Dulles Intl. You will be landing at Saint Thomas Island, also known as Saint Thomas Island Cyril E King.

  • Which airlines offer Wi-Fi service onboard planes from Washington Dulles Airport to Saint Thomas Island?

    JetBlue, American Airlines, and Delta offer inflight Wi-Fi service on the Washington Dulles Airport to Saint Thomas Island flight route.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Saint Thomas Island?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Washington Dulles Airport to Saint Thomas Island flight route.

  • Which airline alliances offer flights from Washington Dulles Airport to Saint Thomas Island?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Washington Dulles Airport and Saint Thomas Island, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Washington Dulles Airport to Saint Thomas Island?

    There are nonstop flights from Washington Dulles Airport to Saint Thomas Island on a daily basis.

  • Which is the best airline for flights from Washington, D.C. to Saint Thomas Island, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Saint Thomas Island are Delta and United Airlines. With an average price for the route of $664 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $677 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Saint Thomas Island?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to Saint Thomas Island.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Saint Thomas Island?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Saint Thomas Island from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Saint Thomas Island?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Saint Thomas Island with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and STT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Saint Thomas Island?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Saint Thomas Island from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island

  • Looking for a cheap flight? 25% of our users found flights on this route for $247 or less one-way and $401 or less round-trip.

Prefer to fly direct from Washington Dulles Airport to Saint Thomas Island?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Washington, D.C. Dulles Intl to Saint Thomas Island Cyril E King.
Find which airlines fly direct from Washington, D.C. Dulles Intl Airport to Saint Thomas Island Cyril E King Airport, which days they fly and book direct flights.

Direct departures

Washington, D.C. Dulles Intl to Saint Thomas Island Cyril E King

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

Saint Thomas Island Cyril E King to Washington, D.C. Dulles Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the top 3 airlines serving from Dulles Intl to Saint Thomas Island

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Saint Thomas Island. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dulles Intl to Saint Thomas Island? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8013 reviews
8.1Boarding
8.5Crew
7.3Food
7.9Entertainment
7.9Comfort
Airline reviews

The food is terrible. The staff is wonderful. Comfort is good.

10.0 ExcellentRonda, Dec 2025
JAX - JFK
Read more Delta reviews

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Getting to the flight was arduous and lengthy. The flight itself was good but the food option wasn’t a good selection. I need to do a Kosher option on my return. Flight crew were nice

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

We had a lot of really rough weather but that was not Delta's fault. Pilot was amazing.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

Everything was smoothly and convenient! Just stay in this way!

Cancelled my flight and the earliest that they are willing give me for the next flight which was 3 days later on a weekday. Only accommodation they are willing to give was $30 airline credit that will expire in 1 year

Terrible Airline I will never fly that airline again. Shame on you for recommending them.

Flight was canceled, huge lines to get baggage returned. Most other airlines had delays but not widespread cancellations like Spirit.

never ever fly spirit airlines you will be screwed in the end

I didn't eat, so I can't rate the food. Delayed set off was beyond

No free snacks or drinks. Freezing. Uncomfortable. No plugs or entertainment. If you fly to LA the make you change terminals with a slow bus. Awful trip that took forever. Terrible airline- maybe the worst I’ve ever flown.

I hope you continue to be one of the great company

Crew are always very angry and dismissive like they seem they are being forced to work. In addition, there was a long line for the bathrooms, and only one was allowed to be used. No reason was given for only one bathroom being available; apparently, the stewardess was more interested in using the jumpseat instead of allowing the customers to use the bathroom.

Very positive in both directions. Safe travels, nice staff, lost and found in fact found my phone under my chair! I was out of cash after my NYC trip otherwise I would've offered a reward for helping my day out immensly! Thanks you so much Spirit staff!

Everything you need to know for your flight from Dulles Intl to Saint Thomas Island

Information on your arrival and departure airports