IAD - STT

$151 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 10/18. 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

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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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

Sat, Nov 15 - Fri, Dec 5
Multiple Airlines Logo
8:36 pm - 3:11 pmIAD-STT
17h 35m1 stop
Multiple Airlines Logo
4:06 pm - 7:35 amSTT-IAD
16h 29m1 stop
$301Multiple Airlines
Find Deal
Sat, Nov 8 - Fri, Nov 14
Multiple Airlines Logo
8:36 pm - 3:11 pmIAD-STT
17h 35m1 stop
Multiple Airlines Logo
4:06 pm - 7:51 pmSTT-IAD
28h 45m1 stop
$302Multiple Airlines
Find Deal
Sat, Nov 8 - Sun, Nov 16
Multiple Airlines Logo
8:36 pm - 3:11 pmIAD-STT
17h 35m1 stop
Multiple Airlines Logo
4:06 pm - 7:52 pmSTT-IAD
28h 46m1 stop
$331Multiple Airlines
Find Deal
Sat, Oct 25 - Sat, Nov 1
Multiple Airlines Logo
9:38 pm - 1:35 pmIAD-STT
15h 57m1 stop
Multiple Airlines Logo
11:01 am - 11:55 pmSTT-IAD
12h 54m2 stops
$335Multiple Airlines
Find Deal
Thu, Jan 29 - Mon, Feb 2
United Airlines Logo
8:59 am - 1:56 pmIAD-STT
3h 57mnonstop
United Airlines Logo
5:25 pm - 11:18 pmSTT-IAD
6h 53m1 stop
$465United Airlines
Find Deal
Sat, Jan 17 - Wed, Jan 21
American Airlines Logo
8:10 pm - 11:50 amIAD-STT
14h 40m1 stop
American Airlines Logo
4:25 pm - 8:41 amSTT-IAD
17h 16m1 stop
$469American Airlines
Find Deal
Mon, Oct 27 - Mon, Nov 3
American Airlines Logo
8:25 pm - 12:00 pmIAD-STT
15h 35m1 stop
American Airlines Logo
4:35 pm - 11:07 pmSTT-IAD
7h 32m1 stop
$470American Airlines
Find Deal
Sat, Nov 29 - Tue, Dec 9
United Airlines Logo
8:59 am - 1:56 pmIAD-STT
3h 57mnonstop
United Airlines Logo
1:02 pm - 4:25 pmSTT-IAD
4h 23mnonstop
$485United Airlines
Find Deal
Sat, Nov 8 - Thu, Nov 13
United Airlines Logo
6:30 am - 4:18 pmIAD-STT
8h 48m1 stop
United Airlines Logo
2:15 pm - 10:58 pmSTT-IAD
9h 43m1 stop
$494United Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
United Airlines Logo
8:15 am - 1:12 pmIAD-STT
3h 57mnonstop
United Airlines Logo
1:02 pm - 4:25 pmSTT-IAD
4h 23mnonstop
$504United Airlines
Find Deal

Everything you should know

Our travelers' advice
AI-generated summary based on content written by travel experts
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
United Airlines
Cheapest • from $465 (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 39% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 23% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$301
Overall average: $681
Multiple Airlines
Sat 11/15Fri 12/5
IAD - STT • 1 stop
Cheapest non-stop
$460
Typical prices: $548-858
United Airlines
Wed 12/3Mon 12/8
IAD - STT • Non-stop
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!
Expert advice

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

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-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.
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.

Read more about IADby Stefanie Waldek
STT

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

Read more about STTby Marisa Garcia
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
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 Thursday and more expensive on a Saturday. On your return trip to Washington Dulles Airport, you should consider flying back on a Saturday, 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 $536 (return) on average. On the other hand, the most expensive months are March and April, where the average cost of round-trip tickets is $935 and $805 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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $675 on average.

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 39% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$151
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly with an average 16% 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 $151 for a one-way ticket and $301 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?

    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?

    Star Alliance is the only airline alliance operating flights between Washington Dulles Airport and Saint Thomas Island.

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

    You can catch a nonstop flight from Washington Dulles Airport to Saint Thomas Island on Saturday.

  • 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 $694 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 $697 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 $313 or less one-way and $549 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 7954 reviews
7.9Comfort
7.3Food
8.5Crew
8.2Boarding
7.9Entertainment
Airline reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

10.0 ExcellentAnonymous, Sep 2025CLT - BOS
Read more Delta reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Nothing special. The crew never went out of their way for anything.

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

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.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

We were given vouchers we couldn’t use with a 5.5 hour delay

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

Everything was fine. I'm average height and I pack light. I'm ready for my Spirit flight.

Changing the flight time to 6:15 am on the return flight is extremely inconvenient. The flight was okay. It was on time. The crew was friendly. The seats were uncomfortable. All the upsells are annoying, and I would prefer paying a single higher fee and not have to purchase so much extra.

Spirit Airlines was ok but TRAVELHELPDESK, the 3rd party travel agent IS A JOKE! VERY RUDE CUSTOMER AGENTS ont he phone. NO HELP AT ALL. But the airlines was ok.

No Tumberlence smooth flight. Try to change the menu on Snacks.

Cancelled my flight last minute and did not help me rebook. It was a horrible experience.

No frills - because you get what you pay for. The crew was amazing!! I had plenty of room to spread out because the flight was half full. Which made it easy to sleep.

The terminal crew is so rude cabin crew is extremely rude flight is very good

Spirit is low fare air line. Food also cost you. No free food.

The flight was delayed twice with minimal explanation. The terminal and airplane were filthy. The food voucher didn’t even cover a tiny pizza from a kiosk in the terminal. All in all, a pretty miserable experience for a flight to attend a funeral

I will use spirit more New clean aircraft Excellent crew ! Quick boarding process !

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

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