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IAD - STT

$129 Find Cheap Flights from Washington Dulles Airport to Saint Thomas Island - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$377
Typical prices: $383-$720
American Airlines
Sun 12/2Sun 12/9
IAD - STT • 1 stop
Cheapest non-stop
$381
Typical prices: $405-$733
United Airlines
Sun 11/4Mon 11/12
IAD - STT • Non-stop
Nonstop flights
Every day
You can fly direct with United Airlines. Average duration is 4h
Direct flights
+1
Direct flights
+1
When to book
5 weeks
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 24% compared to booking last minute.
Insights
Insights
When to travel
April
Cheapest • 26% price drop
April
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Newark (EWR)
Cheapest • Avg $396 (round-trip)
San Juan Luis Munoz Marin Intl (SJU)
Shortest trip • 5h 59m (one-way)
Insights
Insights
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We hope you love your trip to Saint Thomas Island!
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Expert advice
Flight Deals

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

 
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

Wed, Dec 2 - Wed, Dec 9
American Airlines Logo
7:14 pm - 1:37 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
17h 23m1 stop Charlotte Douglas
American Airlines Logo
2:02 pm - 8:52 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
7h 50m1 stop Charlotte Douglas
$377American Airlines
Tue, Mar 9 - Tue, Mar 16
Delta Logo
7:00 am - 3:45 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
7h 45m1 stop Atlanta Hartsfield-Jackson
Delta Logo
1:55 pm - 9:12 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
7h 17m1 stop Atlanta Hartsfield-Jackson
$380Delta
Wed, Nov 4 - Thu, Nov 12
United Airlines Logo
8:56 am - 1:56 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
4h 00mnonstop
United Airlines Logo
1:07 pm - 4:30 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
4h 23mnonstop
$381United Airlines
Thu, Jan 28 - Mon, Feb 1
United Airlines Logo
8:56 am - 1:56 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
4h 00mnonstop
United Airlines Logo
3:00 pm - 12:45 amSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
10h 45m1 stop Chicago O'Hare Intl
$385United Airlines
Tue, Jan 5 - Tue, Jan 12
American Airlines Logo
6:00 am - 3:42 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
8h 42m1 stop Charlotte Douglas
American Airlines Logo
1:58 pm - 8:50 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
7h 52m1 stop Charlotte Douglas
$390American Airlines
Tue, Jan 5 - Tue, Jan 12
American Airlines Logo
6:01 am - 2:37 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
7h 36m1 stop Miami
American Airlines Logo
1:58 pm - 8:50 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
7h 52m1 stop Charlotte Douglas
$392American Airlines
Sun, Jan 31 - Sun, Feb 7
Delta Logo
6:00 am - 4:15 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
9h 15m1 stop Atlanta Hartsfield-Jackson
Delta Logo
1:50 pm - 12:20 amSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
11h 30m1 stop Atlanta Hartsfield-Jackson
$394Delta
Mon, Jan 18 - Sun, Jan 24
Delta Logo
7:00 am - 4:15 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
8h 15m1 stop Atlanta Hartsfield-Jackson
Delta Logo
4:15 pm - 12:20 amSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
9h 05m1 stop Atlanta Hartsfield-Jackson
$395Delta
Fri, Jan 8 - Wed, Jan 13
Multiple Airlines Logo
6:12 pm - 1:50 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
18h 38m1 stop Tampa
Multiple Airlines Logo
2:50 pm - 5:17 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
27h 27m1 stop Tampa
$547Multiple Airlines
Fri, Jan 8 - Wed, Jan 13
Multiple Airlines Logo
6:12 pm - 1:50 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
18h 38m1 stop Tampa
Multiple Airlines Logo
2:50 pm - 2:43 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
24h 53m2 stops Tampa Atlanta Hartsfield-Jackson
$555Multiple Airlines
Booking Insights

Price, demand and travel trends for Washington, D.C. Dulles Intl Airport to Saint Thomas Island flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

Round-trip flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island typically range from $383 to $720. The lowest price found in the past 5 days was $377, on American Airlines.

What's the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

Based on deals KAYAK users found in the last 12 months, Tuesday is the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Saint Thomas Island. It’s 18% cheaper than the average day, while Saturday is the most expensive, with prices 13% higher.

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

•April is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Saint Thomas Island at $398 round-trip.
•June ($734) and August ($719) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 84% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

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

Flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island are cheapest 5 weeks before departure. Booking in this window typically costs about 24% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals
Expert advice

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

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on STT

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 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

Key details for Washington, D.C. Dulles Intl Airport to Saint Thomas Island flights

Low season

September

Cheapest flight

$129
Beat the crowds with an average 94% drop in travelers.
The most popular month to fly with an average 20% increase in travelers.
One-way flight from Washington, D.C. Dulles Intl 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

Your Washington, D.C. Dulles Intl Airport to Saint Thomas Island flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What are the earliest and latest flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

    These are the earliest and latest flight times available from Washington, D.C. Dulles Intl Airport to Saint Thomas Island:

    • Earliest: departs at 8:56 am and lands at 12:56 pm
    • Latest: departs at 12:50 pm and lands at 4:50 pm.

    The flight takes about 4h.

  • What cabin classes can I book on flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

    Two cabin classes are available on flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island:

    • Economy Class
    • First Class

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

    A nonstop flight from Washington, D.C. Dulles Intl Airport to Saint Thomas Island takes 4h, covering 1,608 miles.

  • Do I need a passport to fly from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Washington, D.C. Dulles Intl Airport to Saint Thomas Island flight?

    Round-trip flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island range from $383 to $720, with an average of $537 over the past 12 months. Anything below $383 counts as a good deal.

  • How expensive are last-minute Washington, D.C. Dulles Intl Airport to Saint Thomas Island flights?

    Last-minute fares on this route (booked within two weeks of departure) run 2% above the $537 route average. Book 5 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $396 round-trip via Newark (EWR), compared to $553 for nonstop.

  • What is the standard checked-bag allowance on flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$80 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

    The Boeing 737 MAX 8 family is used most often on this route, operated mainly by United Airlines and Alaska Airlines. Other aircraft seen on the route include Boeing 737-700 variants.

  • How are flight departures from Washington, D.C. Dulles Intl Airport to Saint Thomas Island spread across the day?

    Morning is the busiest departure period on Washington, D.C. Dulles Intl Airport to Saint Thomas Island flights, with 100% of flights leaving in that window. Afternoon departures account for 0%, evening flights for 0%, and night flights for 0%.

  • Have flight prices from Washington, D.C. Dulles Intl Airport to Saint Thomas Island changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $377 to $3,318. That means the highest observed fare was about 9x higher than the lowest one.

  • Which airlines offer Wi-Fi on Washington, D.C. Dulles Intl Airport to Saint Thomas Island flights?

    JetBlue is the only airline on the Washington, D.C. Dulles Intl Airport to Saint Thomas Island route offering in-flight Wi-Fi. Pricing depends on fare class.

  • How are flight prices from Washington, D.C. Dulles Intl Airport to Saint Thomas Island looking right now?

    One-way fares from Washington, D.C. Dulles Intl Airport to Saint Thomas Island are currently lower than usual. Average one-way flight prices are about $176, which is 27% below the typical average for this route.

  • What car rental options are available at Saint Thomas Island Cyril E King Airport (STT)?

    Saint Thomas Island Cyril E King Airport (STT) hosts 5 major car rental companies, with daily rates starting from around $19 for economy cars. Top options include:

    • Budget
    • Thrifty
    • Dollar
    • Alamo
    • Hertz

  • Which airports can I use when flying from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

    Flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island usually depart from Washington, D.C. Dulles Intl (IAD) and arrive at Saint Thomas Island Cyril E King (STT).

  • Which airports do connecting flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island pass through?

    One-stop flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island most commonly connect through:

    • Charlotte Douglas (CLT) - 49% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) - 21% of one-stop connections
    • San Juan Luis Munoz Marin Intl (SJU) - 16% of one-stop connections
    • Houston George Bush Intcntl (IAH) - 12% of one-stop connections

  • Can I save money by using flexible dates for flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

    Yes. Flexible dates can save you up to 28% on flights from Washington, D.C. Dulles Intl Airport to Saint Thomas Island. Tuesday is the cheapest departure day at $442 round-trip on average, while Saturday is the most expensive at $608, a difference of $166.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What airlines fly from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

    Only United Airlines operates flights between Washington, D.C. Dulles Intl Airport and Saint Thomas Island.

  • How much time can I save by choosing a different layover airport from Washington, D.C. Dulles Intl Airport to Saint Thomas Island?

    Flying via San Juan Luis Munoz Marin Intl (SJU) gives the shortest average 1-stop total travel time at 5h 59m, compared with 7h 40m via Atlanta Hartsfield-Jackson (ATL) and 7h 52m via Newark (EWR).

  • What popular places can I visit in Saint Thomas Island?

    Some of the most popular sights in Saint Thomas Island are Sapphire Beach, Coki Beach and 99 Steps. These are among the most viewed places in Saint Thomas Island on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Washington, D.C. Dulles Intl Airport to Saint Thomas Island flights?

    Among airlines operating Washington, D.C. Dulles Intl Airport to Saint Thomas Island flights:

    • United Airlines: offers extra legroom; offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Washington, D.C. Dulles Intl Airport to Saint Thomas Island flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • United Airlines: a cabin bag and a checked bag in Economy Class
    • JetBlue: a cabin bag in Economy Class class

    Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

Your guide to booking Washington, D.C. Dulles Intl Airport to Saint Thomas Island flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Tuesday departure and avoid flying on Saturday. On this route, Tuesday flights average $442, about $166 less than Saturday fares (27% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 5 weeks before you fly. On this route, that window historically saves about 24% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Washington, D.C. Dulles Intl Airport to Saint Thomas Island trip for April. Fares historically average $398 round-trip in that month - typically $336 less than the most expensive month, which is June (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Newark Airport (EWR) can be cheaper than flying direct. The cheapest layover option averages $396 round-trip on this route - about $157 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Saint Thomas Island Cyril E King Airport.

    • Starz Hotel
    • Sunset Gardens Guesthouse
    • Island View Guesthouse

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

 
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

More options for your flight from Dulles Intl to Saint Thomas Island

Complete your trip to Saint Thomas Island with a hotel stay or car rental

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