C$601 Cheap Flights from Belfast (BELF) to Washington Dulles (IAD)

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Flight deals from Belfast to Washington Dulles Airport

Looking for a cheap last-minute deal or the best return flight from Belfast to Washington Dulles? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Belfast to Washington Dulles

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Belfast to Washington Dulles flights are currently cheapest in April.

Belfast to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight foundC$601
Cheapest month to flyApril

Finding cheap flights from Belfast to Washington Dulles: Frequently asked questions

The best price we found for a return flight from Belfast to Washington Dulles is C$811. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Belfast to Washington Dulles. But we found flights with one stop from C$811.
As of March 2026, there are no flights flying from Belfast to Washington Dulles.
The cheapest month to fly from Belfast to Washington Dulles is usually May.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Belfast to Washington Dulles Airport on Wednesday, May 13, 2026.
No airlines currently offer direct flights between Belfast and Washington Dulles Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington Dulles but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Washington Dulles is easyJet .

Flying from Belfast to Washington Dulles International Airport (IAD): what you need to know

  • There are two main airports you can start your trip from in Belfast. Explore your options departing from Belfast International Airport (BFS) or George Best Belfast City Airport (BHD) when planning your flight from Belfast to Washington Dulles International Airport (IAD).

  • Washington DC is 4 hours behind Belfast. Washington Dulles International Airport is located in Washington DC, which operates on the UTC-4 timezone.

  • Your flight from Belfast to IAD won't wait if you're late, so get to the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're flying internationally.

  • Show up at the airport even earlier during popular months like August. Aim for two hours before a domestic departure and four hours ahead of international flights. Once you've checked in, you can use any extra time to relax or grab something to eat.

Airports in Belfast

Belfast International Airport (BFS)

  • Consider adding a stopover to potentially save money on your flight from Belfast to IAD. Simply deselect 'Direct flights only' when searching for departures from Belfast International Airport (BFS). Take a break (and maybe save some cash) by stopping at one of these popular options:

    • Edinburgh Airport (EDI)

    • Geneve Airport (GVA)

    • Charles de Gaulle Airport (CDG)

  • BFS is about 32 kilometres from the centre of Belfast. To help you work out how to get there, use Google Maps. This handy travel app will give you the best route and your public transport options.

  • Catching an early flight from Belfast to Washington Dulles International Airport? Avoid rushing to the terminal (and enjoy a little extra shut-eye) by choosing one of these hotels near Belfast International Airport:

George Best Belfast City Airport (BHD)

  • Visit family or friends or just take a moment to recharge with a stopover. If you'd like to split up your flight from Belfast to Washington Dulles International Airport, here's where you can stop when departing from George Best Belfast City Airport:

    • Edinburgh Airport (EDI)

    • Amsterdam Airport Schiphol Airport (AMS)

    • Charles de Gaulle Airport (CDG)

  • BHD is about 8 kilometres from central Belfast. It takes 12 minutes or so to get to the airport by car from the city centre. Public transport takes roughly 22 minutes.

  • Get a head start on your vacation with an extra night away from home. Before catching your flight from Belfast to IAD, take it easy in one of these hotels close to George Best Belfast City Airport:

About Washington Dulles International Airport (IAD)

Getting from Washington Dulles International Airport (IAD) to central Washington DC

  • Washington Dulles International Airport is approximately 56 kilometres from central Washington DC. With your own car rental or if you're catching a cab, the drive is around 51 minutes.

  • If you're using public transport, expect a journey time of roughly 3 hours and 26 minutes.

How to find the cheapest flights from Belfast to Washington Dulles International Airport (IAD)

  • The best price we've seen for a one-way ticket from Belfast to Washington Dulles International Airport is C$601. The cheapest price for a return flight is C$811. Keep in mind fares may change due to demand at the time of booking.

  • To score flight tickets from Belfast to IAD, book in advance. Airlines typically offer their most competitively priced fares when flights are first made available.

  • Finding flight tickets from Belfast to Washington Dulles International Airport is easier if you're flexible with your dates. Try using the 'Whole month' search function to see the lowest fares across the month and score a great deal.

  • Snapping up a cheap ticket from Belfast to IAD is easy with Price Alerts. All you need to do is create one of these automatic alerts and we'll get in touch as soon as the price drops.

  • Use the filters to tailor your flights from Belfast to Washington Dulles International Airport. Select your preferred departure and arrival times, airlines and number of stops. You can also sort your results by 'Cheapest' to see the best deals.

The best time to fly from Belfast to Washington Dulles International Airport (IAD)

  • It's time to choose your dates for your flight from Belfast to Washington Dulles International Airport. July is the busiest month to travel to Washington DC. If you prefer a more low-key vibe, go in February.

  • Think about the type of weather that'll work with your plans for Washington DC. The warmest month is July. Book your flights from Belfast to IAD sometime then and you can expect temperatures of between 19ºC and 33ºC.

  • If you want cooler conditions, search for a cheap flight from Belfast to Washington Dulles International Airport in January when temperatures average between -6ºC and 10ºC.

More about Washington DC

  • When it comes to looking for somewhere to rest your head, you'll find the top stays in Washington DC right here. Explore these options as soon as you've locked in your flight from Belfast to Washington Dulles International Airport:

  • White House Historical Association and The White House are just a couple of the top-rated attractions to add to your Washington DC must-do list. Keep the adventure rolling by checking out National Mall.

Complete your Washington DC trip with a car rental

  • Exit all those tabs and leave the hard work to us. We've also got incredible deals on car rentals in Washington DC once you've booked your hotel and cheap flight from Belfast to Washington Dulles International Airport. Instantly compare prices all in one place and drive off with the perfect rental for less.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.