When did momondo last update prices for flights from Belfast to Washington?

Prices for flights from Belfast to Washington refresh daily.

How old do you have to be to fly from Belfast to Washington?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Belfast to Washington.

What documentation or ID do you need to fly to Washington?

The travel and health documents you'll need for your trip to Washington may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$802 Cheap Flights from Belfast to Washington in 2026

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Find the cheapest flights from Belfast to Washington

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:30 am - 6:00 pm

BFS

SEA

18h 30m

2 stops

3:35 pm - 5:50 pm

SEA

BFS

19h 15m

2 stops

$802Multiple Airlines

Thu, Mar 19 - Thu, Mar 26

6:35 am - 11:30 am

BHD

SEA

12h 55m

1 stop

7:50 pm - 6:35 pm

SEA

BHD

15h 45m

1 stop

$897British Airways

Sat, Mar 7 - Mon, Mar 9

6:35 am - 11:30 am

BHD

SEA

12h 55m

1 stop

7:21 am - 2:15 pm

SEA

BHD

23h 54m

2 stops

$898British Airways

Sat, Mar 7 - Mon, Mar 9

6:35 am - 11:04 pm

BHD

SEA

24h 29m

2 stops

7:21 am - 2:15 pm

SEA

BHD

23h 54m

2 stops

$903British Airways

Sat, Mar 7 - Mon, Mar 9

9:40 pm - 7:20 pm

BFS

SEA

28h 40m

3 stops

3:35 pm - 8:35 pm

SEA

BFS

22h 00m

2 stops

$1,140Multiple Airlines

Thu, Mar 19 - Thu, Mar 26

9:40 pm - 7:20 pm

BFS

SEA

28h 40m

3 stops

3:35 pm - 9:05 pm

SEA

BFS

22h 30m

3 stops

$1,199Multiple Airlines

Thu, Mar 19 - Thu, Mar 26

British Airways flights from Belfast to State of Washington

Our best British Airways deals on Belfast to State of Washington flight tickets

British Airways

Mar 7

BHD6:35 amBelfast City

12h 55m

1 stop

SEA11:30 amSeattle/Tacoma Intl

Mar 9

SEA7:50 pmSeattle/Tacoma Intl

15h 45m

1 stop

BHD6:35 pmBelfast City

$897

British Airways

Mar 7

BHD6:35 amBelfast City

12h 55m

1 stop

SEA11:30 amSeattle/Tacoma Intl

Mar 9

SEA7:21 amSeattle/Tacoma Intl

23h 54m

2 stops

BHD2:15 pmBelfast City

$898

British Airways

Mar 7

BHD6:35 amBelfast City

24h 29m

2 stops

SEA11:04 pmSeattle/Tacoma Intl

Mar 9

SEA7:21 amSeattle/Tacoma Intl

23h 54m

2 stops

BHD2:15 pmBelfast City

$903

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 3/19

6:30 am-6:00 pm

2 stops18h 30m

Seattle/Tacoma Intl

Thu 3/26

3:35 pm-5:50 pm

2 stops19h 15m

$802

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:30 am

1 stop12h 55m

Seattle/Tacoma Intl

Mon 3/9

7:50 pm-6:35 pm

1 stop15h 45m

$897

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:30 am

1 stop12h 55m

Seattle/Tacoma Intl

Mon 3/9

7:21 am-2:15 pm

2 stops23h 54m

$898

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:04 pm

2 stops24h 29m

Seattle/Tacoma Intl

Mon 3/9

7:21 am-2:15 pm

2 stops23h 54m

$903

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 3/19

9:40 pm-7:20 pm

3 stops28h 40m

Seattle/Tacoma Intl

Thu 3/26

3:35 pm-8:35 pm

2 stops22h 00m

$1,140

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 3/19

9:40 pm-7:20 pm

3 stops28h 40m

Seattle/Tacoma Intl

Thu 3/26

3:35 pm-9:05 pm

3 stops22h 30m

$1,199

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 8/3

3:20 pm-11:35 am

1 stop28h 15m

$1,060

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 8/3

7:35 pm-8:31 pm

2 stops32h 56m

$1,070

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 8/3

6:30 pm-8:31 pm

2 stops34h 01m

$1,072

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 8/3

6:30 am-11:35 am

1 stop13h 05m

$1,074

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first

How to get the cheapest flight ticket from Belfast to State of Washington

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Belfast to Washington?

American Airlines and British Airways are the most popular carriers operating from Belfast to Washington

Cheap Belfast to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Belfast to State of Washington

Fastest flight time	12h 55m
Direct flights	None

The fastest flight from Belfast to State of Washington takes 12h 55m

There are no direct flights from Belfast to State of Washington. There are no popular flight routes from Belfast to State of Washington.

Search flight deals

When did momondo last update prices for flights from Belfast to Washington?
Prices for flights from Belfast to Washington refresh daily.
How old do you have to be to fly from Belfast to Washington?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Belfast to Washington.
What documentation or ID do you need to fly to Washington?
The travel and health documents you'll need for your trip to Washington may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Belfast to Washington?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Belfast to Washington. momondo saves you time and could save you money on your trip.

Can I find flights from Belfast to Washington with flexible booking policies on momondo?

Yes. All flights to Washington from Belfast on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Belfast to Washington?

momondo helps you find the best flight between Belfast and Washington by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Belfast to Washington right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Washington, momondo offers a useful price alert feature which will track prices for flights to Washington from Belfast and alert you when they change.