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.

$533 Cheap Flights from Belfast to Washington in 2026

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.

9:40 am - 9:36 pm

BHD

SEA

19h 56m

2 stops

8:20 pm - 5:35 pm

SEA

BHD

13h 15m

1 stop

$773British Airways

Tue, Sep 15 - Tue, Oct 6

9:40 am - 9:36 pm

BHD

SEA

19h 56m

2 stops

8:20 pm - 5:35 pm

SEA

BHD

13h 15m

1 stop

$775British Airways

Tue, Sep 15 - Tue, Oct 6

9:40 am - 9:36 pm

BHD

SEA

19h 56m

2 stops

12:00 pm - 3:20 pm

SEA

BHD

19h 20m

2 stops

$782British Airways

Tue, Sep 15 - Tue, Oct 6

9:40 am - 9:36 pm

BHD

SEA

19h 56m

2 stops

12:00 pm - 3:20 pm

SEA

BHD

19h 20m

2 stops

$784British Airways

Tue, Sep 15 - Tue, Oct 6

3:20 pm - 11:35 am

BHD

SEA

28h 15m

1 stop

5:40 pm - 6:45 pm

SEA

BHD

17h 05m

2 stops

$794British Airways

Mon, Sep 7 - Mon, Sep 28

3:20 pm - 11:35 am

BHD

SEA

28h 15m

1 stop

5:40 pm - 8:35 pm

SEA

BHD

18h 55m

2 stops

$797British Airways

Mon, Sep 7 - Mon, Sep 28

5:30 pm - 4:35 pm

BHD

SEA

31h 05m

1 stop

5:45 pm - 4:55 pm

SEA

BHD

15h 10m

1 stop

$799KLM

Tue, Sep 15 - Tue, Oct 6

6:30 am - 5:10 pm

BHD

SEA

18h 40m

2 stops

5:40 pm - 8:35 pm

SEA

BHD

18h 55m

2 stops

$800British Airways

Mon, Sep 7 - Mon, Sep 28

6:30 am - 5:10 pm

BHD

SEA

18h 40m

2 stops

5:40 pm - 7:25 pm

SEA

BHD

17h 45m

2 stops

$803British Airways

Mon, Sep 7 - Mon, Sep 28

7:35 pm - 11:35 am

BHD

SEA

24h 00m

1 stop

1:30 pm - 12:55 pm

SEA

BHD

15h 25m

1 stop

$807Multiple Airlines

Mon, Sep 7 - Mon, Sep 28

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British Airways flights from Belfast to State of Washington

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

British Airways

Sep 15

BHD9:40 amBelfast City

19h 56m

2 stops

SEA9:36 pmSeattle/Tacoma Intl

Oct 6

SEA8:20 pmSeattle/Tacoma Intl

13h 15m

1 stop

BHD5:35 pmBelfast City

$773

British Airways

Sep 15

BHD9:40 amBelfast City

19h 56m

2 stops

SEA9:36 pmSeattle/Tacoma Intl

Oct 6

SEA8:20 pmSeattle/Tacoma Intl

13h 15m

1 stop

BHD5:35 pmBelfast City

$775

British Airways

Sep 15

BHD9:40 amBelfast City

19h 56m

2 stops

SEA9:36 pmSeattle/Tacoma Intl

Oct 6

SEA12:00 pmSeattle/Tacoma Intl

19h 20m

2 stops

BHD3:20 pmBelfast City

$782

KLM flights from Belfast to State of Washington

Our best KLM deals on Belfast to State of Washington flight tickets

KLM

Sep 15

BHD5:30 pmBelfast City

31h 05m

1 stop

SEA4:35 pmSeattle/Tacoma Intl

Oct 6

SEA5:45 pmSeattle/Tacoma Intl

15h 10m

1 stop

BHD4:55 pmBelfast City

$799

KLM

Sep 14

BHD5:30 pmBelfast City

28h 30m

2 stops

SEA2:00 pmSeattle/Tacoma Intl

Sep 20

SEA1:50 pmSeattle/Tacoma Intl

19h 05m

1 stop

BHD4:55 pmBelfast City

$6,273

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/15

9:40 am-9:36 pm

2 stops19h 56m

Seattle/Tacoma Intl

Tue 10/6

8:20 pm-5:35 pm

1 stop13h 15m

$773

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/15

9:40 am-9:36 pm

2 stops19h 56m

Seattle/Tacoma Intl

Tue 10/6

8:20 pm-5:35 pm

1 stop13h 15m

$775

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/15

9:40 am-9:36 pm

2 stops19h 56m

Seattle/Tacoma Intl

Tue 10/6

12:00 pm-3:20 pm

2 stops19h 20m

$782

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/15

9:40 am-9:36 pm

2 stops19h 56m

Seattle/Tacoma Intl

Tue 10/6

12:00 pm-3:20 pm

2 stops19h 20m

$784

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 9/7

3:20 pm-11:35 am

1 stop28h 15m

Seattle/Tacoma Intl

Mon 9/28

5:40 pm-6:45 pm

2 stops17h 05m

$794

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 9/7

3:20 pm-11:35 am

1 stop28h 15m

Seattle/Tacoma Intl

Mon 9/28

5:40 pm-8:35 pm

2 stops18h 55m

$797

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/15

5:30 pm-4:35 pm

1 stop31h 05m

Seattle/Tacoma Intl

Tue 10/6

5:45 pm-4:55 pm

1 stop15h 10m

$799

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 9/7

6:30 am-5:10 pm

2 stops18h 40m

Seattle/Tacoma Intl

Mon 9/28

5:40 pm-8:35 pm

2 stops18h 55m

$800

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 9/7

6:30 am-5:10 pm

2 stops18h 40m

Seattle/Tacoma Intl

Mon 9/28

5:40 pm-7:25 pm

2 stops17h 45m

$803

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 9/7

7:35 pm-11:35 am

1 stop24h 00m

Seattle/Tacoma Intl

Mon 9/28

1:30 pm-12:55 pm

1 stop15h 25m

$807

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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?

British Airways and Aer Lingus 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	13h 05m
Direct flights	None

The fastest flight from Belfast to State of Washington takes 13h 05m

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

Frequently asked questions about flying from Belfast to Washington

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.