$113 Cheap Flights from Washington (DCA) to St. Thomas (STT)

View $113 flight on Wed, Aug 19, 2026Opens in a new window

Popular airlines from Ronald Reagan Washington National Airport (DCA) to Cyril E. King Airport (STT)

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Cheap Flights from Washington to St. Thomas (DCA-STT)

Prices were available within the past 7 days and start at $113 for one-way flights and $210 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, May 7 - Tue, May 12
DCA
Washington
STT
St. Thomas
$210 Roundtrip, found 13 hours ago
$210
Roundtrip
found 13 hours ago
Select United flight, departing Thu, May 7 from Washington to St. Thomas, returning Tue, May 12, priced at $210 found 13 hours ago
Delta
Mon, Apr 27 - Fri, May 1
DCA
Washington
STT
St. Thomas
$218 Roundtrip, found 2 days ago
$218
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, Apr 27 from Washington to St. Thomas, returning Fri, May 1, priced at $218 found 2 days ago
Southwest Airlines
Thu, May 7 - Wed, May 13
DCA
Washington
STT
St. Thomas
$220 Roundtrip, found 5 hours ago
$220
Roundtrip
found 5 hours ago
Select Southwest Airlines flight, departing Thu, May 7 from Washington to St. Thomas, returning Wed, May 13, priced at $220 found 5 hours ago
United
Thu, May 7 - Tue, May 12
DCA
Washington
STT
St. Thomas
$226 Roundtrip, found 13 hours ago
$226
Roundtrip
found 13 hours ago
Select United flight, departing Thu, May 7 from Washington to St. Thomas, returning Tue, May 12, priced at $226 found 13 hours ago
American Airlines
Sun, May 3 - Thu, May 7
DCA
Washington
STT
St. Thomas
$230 Roundtrip, just found
$230
Roundtrip
just found
Select American Airlines flight, departing Sun, May 3 from Washington to St. Thomas, returning Thu, May 7, priced at $230 just found
Delta
Mon, Apr 13 - Thu, Apr 16
DCA
Washington
STT
St. Thomas
$235 Roundtrip, found 1 hour ago
$235
Roundtrip
found 1 hour ago
Select Delta flight, departing Mon, Apr 13 from Washington to St. Thomas, returning Thu, Apr 16, priced at $235 found 1 hour ago
Delta
Sat, Aug 22 - Sat, Aug 29
DCA
Washington
STT
St. Thomas
$240 Roundtrip, just found
$240
Roundtrip
just found
Select Delta flight, departing Sat, Aug 22 from Washington to St. Thomas, returning Sat, Aug 29, priced at $240 just found
Delta
Mon, May 11 - Tue, May 19
DCA
Washington
STT
St. Thomas
$247 Roundtrip, found 1 day ago
$247
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, May 11 from Washington to St. Thomas, returning Tue, May 19, priced at $247 found 1 day ago
American Airlines
Tue, Mar 17 - Tue, Mar 24
DCA
Washington
STT
St. Thomas
$251 Roundtrip, just found
$251
Roundtrip
just found
Select American Airlines flight, departing Tue, Mar 17 from Washington to St. Thomas, returning Tue, Mar 24, priced at $251 just found
JetBlue Airways
Sun, Mar 29 - Tue, Mar 31
DCA
Washington
STT
St. Thomas
$289 Roundtrip, found 10 hours ago
$289
Roundtrip
found 10 hours ago
Select JetBlue Airways flight, departing Sun, Mar 29 from Washington to St. Thomas, returning Tue, Mar 31, priced at $289 found 10 hours ago

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Alternative airports near St. Thomas

Prices were available within the past 7 days. Prices and availability are subject to change.

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Find the cheapest month to fly from Washington (DCA) to St. Thomas (STT)

September is typically the cheapest month to fly

From $199 - $606 per traveler.

Frequently asked questions

How much does a flight from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King) cost?
You can find cheap one-way flights from $113 and cheap return flights from $210 Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King) with Expedia. One-way flights generally range between $136 and $936, and roundtrip flights usually range from $378 to $3323. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King)?
January is the cheapest month to fly from Washington, DC (DCA) to St. Thomas (STT), with average round-trip fares around $358. This price is about 34% lower than the average for the year, likely due to decreased travel demand after the holiday season. Other economical months include February and December.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King)?
Enter DCA to STT and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King)?
Southwest Airlines is one of the cheapest airlines offering connecting flights from Washington, DC (DCA) to St. Thomas (STT), with round-trip tickets starting from around $326. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King)?
To find a cheap flight from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King)?
The best time to fly from Washington, DC (DCA) to St. Thomas (STT) is in January or December. These months feature average return flight prices around $358, making them affordable options. January is perfect for escaping the winter chill, while December allows you to enjoy the holiday spirit in the Caribbean.*Prices based on flights available on Expedia in the last year.
What is the earliest flight from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King)?
The earliest flight from Ronald Reagan Washington National Airport (DCA) to Cyril E. King Airport (STT) typically departs at around 5:00 AM, operated by American Airlines. This service is seasonal and active in April and May, making it a great option for an early start to your Caribbean getaway. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King)?
The most popular departure times for flights from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King) are in the morning, from 6am to 9am. About 65% of passengers prefer this time window. Many major carriers, including American Airlines, JetBlue, and Delta Airlines, offer flights during this window. This timing works well because it allows you to start your day in the beautiful Caribbean.
How long does it take to fly from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King)?
Flights from DCA to STT with one stop typically take around 8 hours, covering approximately 1,592 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King)?
First class seats are offered on the DCA to STT route with United Airlines and Delta Air Lines.
How do I earn miles on a Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King) flight with Expedia?
It's easy to earn miles on a Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for St. Thomas from Ronald Reagan Washington National (DCA)?
From Ronald Reagan Washington National (DCA), you can fly into Cyril E. King (STT) to reach St. Thomas. Some flights may connect through major hubs like Liberty Intl. (EWR), O'Hare Intl. (ORD), Logan Intl. (BOS) before reaching St. Thomas. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King) at the last minute?
Typically, booking a last minute flight from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King) flight and hotel package?
Securing a Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King) St Thomas Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King)?
If you booked your Washington, DC (DCA-Ronald Reagan Washington National) to St. Thomas (STT-Cyril E. King) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Ronald Reagan Washington National
Destination airport
Cyril E. King
Airlines serving
American Airlines, Delta, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$210
Distance
1591 mi

Book with confidence

Washington to St. Thomas Flights

The cheapest times to fly from Washington to St. Thomas

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to St. Thomas are during the month of May. You can find some of the cheapest flights from Washington to St. Thomas with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to St. Thomas

Sunday is one of the best days to book for cheap flights from Washington to St. Thomas: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to St. Thomas

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to St. Thomas in 2026. You can also book with separate airlines for your outbound and return journeys, from $113 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to St. Thomas flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to St. Thomas airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to St. Thomas Flights

*Flight schedules are subject to change.

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*Available to One Key members.