CA $556 Cheap Flights from St. Thomas (STT) to Washington (IAD)

View CA $556 flight on Mon, Apr. 27, 2026Opens in a new window

Popular airlines from Cyril E. King Airport (STT) to Washington Dulles International Airport (IAD)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap flights from St. Thomas (STT) to Washington (IAD)

Prices were available within the past 7 days and start at CA $556 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

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

November is typically the cheapest month to fly

From CA $590 - CA $1,311 per traveller.

Graph displaying average flight prices per month

Flight from St. Thomas to Washington (STT - IAD) route information
Origin airport
Cyril E. King
Destination airport
Washington Dulles Intl.
Distance
2574 km
Average flight time
5 hours 12 mins

St. Thomas to Chantilly Flights

The easy way to book your flights from St. Thomas to Washington 

With Expedia, it’s simple to find and book flights to Washington from St. Thomas whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 3 airlines that cover this route. There are United Airlines nonstop flights to Washington Dulles Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from St. Thomas to Washington today, tomorrow, or this week.  

 

Save dollars with cheap flights from Cyril E. King, STT to Washington Dulles Intl., IAD 

Sort your search results by price to find great deals on your flight from St. Thomas to Washington—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Washington from St. Thomas currently is just rising to .  

Here are more money-saving tips: 

  • Fly in when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Washington  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Washington from St. Thomas 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Washington with Expedia today.

Frequently asked questions

How much is a flight from Cyril E. King Airport (STT) to IAD?
Pack your bags, because round-trip journeys between Cyril E. King Airport (STT) and Dulles Intl. Airport start from . That's based on fares listed within the last 7 days on Expedia for flights departing within the next year. Prices can rise quickly, so book today to get the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from STT to Washington Dulles Intl. Airport (IAD)?
This differs from airline to airline, as each one has its own set of terms and conditions. Visit the Customer Service Portal, where there are easy instructions on how to cancel online.
How do I find cheap flights from Cyril E. King Airport to Washington Dulles Intl. Airport (IAD) that have flexible change policies?
Flights from STT to IAD offering flexible change policies are available with many airlines. Simply use our "No change fees" filter when searching. You'll only need to pay the fare difference, with no extra fees to worry about.
How many hours is the flight from Cyril E. King Airport to Dulles Intl. Airport?
It takes about 6 hours and 54 minutes to fly from STT to IAD. But with a solid playlist and an interesting book, the time will pass by quicker.
How far is the flight from Cyril E. King Airport to Dulles Intl. Airport?
You'll be cruising at altitude for a while, as the flight distance from STT to Washington Dulles Intl. Airport (IAD) is 2,600 kilometres. Put together a playlist of your favourite podcasts before leaving home to stay entertained during the trip.
Which airlines fly direct from Cyril E. King Airport to IAD?
Operating 30 flights every month, United Airlines (UA) is a popular choice when flying straight from STT to IAD.
Are STT to Dulles Intl. Airport flight tickets cheaper when they're purchased at the last minute?
Flight prices fluctuate, so not always. While last-minute flight deals between Cyril E. King Airport (STT) and IAD are possible, it's also a good idea to keep track of prices well before you fly. In fact, some air carriers release their prices up to 12 months ahead of the departure date. Expedia is continuously updating the biggest airfare bargains around, so keep checking and be ready to pounce when the fares dip.

Explore a world of travel with Expedia

Washington nearby Airports

Washington

Baltimore

St. Thomas nearby Airports

Christiansted

*Available to Expedia members.