STT - IAD

$153 Find Cheap Flights from Saint Thomas Island to Washington Dulles Airport - Compare and Save

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Everything you should know

Cheapest round-trip
$301
Typical prices: $375-$726
United Airlines
Thu 12/20Sun 12/30
STT - IAD • Non-stop
Cheapest one-way
$153
Typical prices: $225-$531
United Airlines
Tue 1/16
STT - IAD • Non-stop
Nonstop flights
You can fly direct with United Airlines. Average duration is 4h 23m
Direct flights
+1
Direct flights
+1
When to travel
Cheapest • 47% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg $342 (round-trip)
Shortest trip • 5h 50m (one-way)
Insights
Insights
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We hope you love your trip to Washington, D.C. Dulles Intl Airport!
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Expert advice
Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Sun, Dec 20 - Wed, Dec 30
United Airlines Logo
5:25 pm - 8:48 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
4h 23mnonstop
United Airlines Logo
8:56 am - 1:56 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
4h 00mnonstop
$301United Airlines
Sun, Dec 20 - Wed, Dec 30
United Airlines Logo
3:35 pm - 12:41 amSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
10h 06m1 stop Houston George Bush Intcntl
United Airlines Logo
8:56 am - 1:56 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
4h 00mnonstop
$306United Airlines
Sun, Dec 20 - Sun, Jan 3
American Airlines Logo
1:09 pm - 11:21 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
11h 12m1 stop Miami
American Airlines Logo
6:01 am - 5:34 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
10h 33m1 stop Miami
$310American Airlines
Sun, Dec 20 - Wed, Dec 30
American Airlines Logo
5:12 pm - 11:21 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
7h 09m1 stop Miami
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
$315American Airlines
Sun, Nov 22 - Sun, Nov 29
United Airlines Logo
3:00 pm - 12:30 amSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
10h 30m1 stop Chicago O'Hare Intl
United Airlines Logo
8:56 am - 1:56 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
4h 00mnonstop
$327United Airlines
Thu, Dec 24 - Sat, Jan 2
American Airlines Logo
5:12 pm - 11:21 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
7h 09m1 stop Miami
American Airlines Logo
6:01 am - 5:34 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
10h 33m1 stop Miami
$330American Airlines
Mon, Nov 23 - Mon, Nov 30
United Airlines Logo
1:07 pm - 4:30 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
4h 23mnonstop
United Airlines Logo
8:56 am - 1:56 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
4h 00mnonstop
$370United Airlines
Mon, Nov 23 - Mon, Nov 30
United Airlines Logo
3:00 pm - 10:25 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
8h 25m1 stop Newark
United Airlines Logo
8:56 am - 1:56 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
4h 00mnonstop
$389United Airlines
Tue, Jan 19 - Sun, Jan 31
United Airlines Logo
1:07 pm - 4:30 pmSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
4h 23mnonstop
United Airlines Logo
8:56 am - 1:56 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
4h 00mnonstop
$406United Airlines
Tue, Jan 19 - Sun, Jan 31
Delta Logo
4:03 pm - 12:46 amSTT  Saint Thomas Island Cyril E King-IAD Washington, D.C. Dulles Intl
9h 43m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:00 am - 2:53 pmIAD  Washington, D.C. Dulles Intl-STT Saint Thomas Island Cyril E King
7h 53m1 stop Atlanta Hartsfield-Jackson
$434Delta
Booking Insights

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

Round-trip flights from Saint Thomas Island to Washington, D.C. Dulles Intl Airport typically range from $375 to $726. The lowest price found in the past 5 days was $301, on United Airlines.

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

•May is the cheapest month to fly from Saint Thomas Island to Washington, D.C. Dulles Intl Airport at $261 round-trip.
•August ($1,306) and January ($1,027) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 400% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Expert advice

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

 
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.

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.

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

Low season

February

Cheapest flight

$153
Beat the crowds with an average 56% drop in travelers.
The most popular month to fly with an average 78% increase in travelers.
One-way flight from Saint Thomas Island to Washington, D.C. Dulles Intl Airport

When to book flights from Saint Thomas Island to Dulles Intl

Are your dates flexible? Find out the best times to travel from Saint Thomas Island to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Saint Thomas Island to Washington, D.C. Dulles Intl Airport 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 Saint Thomas Island to Washington, D.C. Dulles Intl Airport?

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

    • Earliest: departs at 1:07 pm and lands at 5:30 pm
    • Latest: departs at 5:25 pm and lands at 9:48 pm.

    The flight takes about 4h 23m.

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

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

    • Economy Class
    • First Class

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

    A nonstop flight from Saint Thomas Island to Washington, D.C. Dulles Intl Airport takes 4h 23m, covering 1,608 miles.

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

    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 Saint Thomas Island to Washington, D.C. Dulles Intl Airport flight?

    Round-trip flights from Saint Thomas Island to Washington, D.C. Dulles Intl Airport range from $375 to $726, with an average of $492 over the past 12 months. Anything below $375 counts as a good deal.

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

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $342 round-trip via Charlotte Douglas (CLT), compared to $487 for nonstop.

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

    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 Saint Thomas Island to Washington, D.C. Dulles Intl Airport?

    The Boeing 737 MAX 8 family is used most often on this route, operated mainly by United Airlines. Other aircraft seen on the route include Boeing 757 variants.

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

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

  • Have flight prices from Saint Thomas Island to Washington, D.C. Dulles Intl Airport 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 $301 to $1,233. That means the highest observed fare was about 4x higher than the lowest one.

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

    One-way fares from Saint Thomas Island to Washington, D.C. Dulles Intl Airport are currently lower than usual. Average one-way flight prices are about $157, which is 56% below the typical average for this route.

  • What car rental options are available at Washington, D.C. Dulles Intl Airport (IAD)?

    Washington, D.C. Dulles Intl Airport (IAD) hosts 5 major car rental companies, with daily rates averaging $70 for economy cars. Top options include:

    • Dollar
    • Hertz
    • Budget
    • Sixt
    • Thrifty

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

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

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

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

    • Atlanta Hartsfield-Jackson (ATL) - 50% of one-stop connections
    • Charlotte Douglas (CLT) - 33% of one-stop connections
    • San Juan Luis Munoz Marin Intl (SJU) - 17% of one-stop connections

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

    Yes. Flexible dates can save you up to 47% on flights from Saint Thomas Island to Washington, D.C. Dulles Intl Airport. Wednesday is the cheapest departure day at $429 round-trip on average, while Saturday is the most expensive at $800, a difference of $371.

    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 Saint Thomas Island to Washington, D.C. Dulles Intl Airport?

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

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

    Flying via San Juan Luis Munoz Marin Intl (SJU) gives the shortest average 1-stop total travel time at 5h 50m, compared with 7h via Atlanta Hartsfield-Jackson (ATL) and 7h 12m via Charlotte Douglas (CLT).

  • What is the time difference between Saint Thomas Island and Washington, D.C. Dulles Intl Airport?

    Washington, D.C. Dulles Intl Airport is 1 hour behind Saint Thomas Island (Eastern Time vs Atlantic Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Washington, D.C. Dulles Intl Airport?

    Some of the most popular sights in Washington, D.C. Dulles Intl Airport are Walter E. Washington Convention Center, National Mall and Capital One Arena. These are among the most viewed places in Washington, D.C. Dulles Intl Airport on KAYAK.

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

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

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

Your guide to booking Saint Thomas Island to Washington, D.C. Dulles Intl Airport 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 Wednesday departure and avoid flying on Saturday. On this route, Wednesday flights average $429, about $371 less than Saturday fares (46% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Saint Thomas Island to Washington, D.C. Dulles Intl Airport trip for May. Fares historically average $261 round-trip in that month - typically $1,045 less than the most expensive month, which is August (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Charlotte Douglas Airport (CLT) can be cheaper than flying direct. The cheapest layover option averages $342 round-trip on this route - about $145 less than direct flights (based on the last 12 months).

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

 
Find which airlines fly direct from Saint Thomas Island Cyril E King Airport to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

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

Direct returns

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

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

Complete your trip to Washington, D.C. with a hotel stay or car rental