What is the cheapest airline that flies from Billund to Seattle/Tacoma Intl?

British Airways and Finnair are the most popular carriers operating from Billund to Seattle/Tacoma Intl

When did momondo last update prices for flights from Billund Airport to Seattle/Tacoma Intl Airport?

Prices for flights from Billund Airport to Seattle/Tacoma Intl Airport are updated daily.

How many operators does momondo search for flights from Billund Airport to Seattle/Tacoma Intl Airport?

As of April 2026, there is 1 operator available to choose from for flights from Billund Airport to Seattle/Tacoma Intl Airport.

How old do you have to be to fly from Billund Airport to Seattle/Tacoma Intl Airport?

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 Billund Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$523 Cheap Flights from Billund to Seattle in 2026

Q: What is the typical price of a round-trip flight between Billund and Seattle?

Prices are currently low for flights on this route. Typical prices usually range from $755 to $562. The lowest price recently found on this route was $579.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Billund to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:20 pm - 11:45 am

BLL

SEA

30h 25m

1 stop

6:40 pm - 10:25 pm

SEA

BLL

18h 45m

1 stop

$579Air France

Mon, Apr 27 - Mon, May 4

6:00 am - 4:30 pm

BLL

SEA

19h 30m

1 stop

6:40 pm - 10:25 pm

SEA

BLL

18h 45m

1 stop

$600Air France

Thu, Apr 30 - Mon, May 4

11:45 am - 4:30 pm

BLL

SEA

13h 45m

1 stop

7:15 am - 11:20 am

SEA

BLL

19h 05m

2 stops

$617Delta

Mon, Apr 27 - Mon, May 4

6:00 am - 11:40 am

BLL

SEA

14h 40m

1 stop

7:15 am - 11:20 am

SEA

BLL

19h 05m

2 stops

$620Delta

Thu, Apr 30 - Mon, May 4

11:45 am - 11:54 pm

BLL

SEA

21h 09m

2 stops

7:15 am - 11:20 am

SEA

BLL

19h 05m

2 stops

$623Delta

Mon, Apr 27 - Mon, May 4

11:45 am - 9:50 pm

BLL

SEA

19h 05m

2 stops

7:15 am - 11:20 am

SEA

BLL

19h 05m

2 stops

$626Delta

Thu, Apr 30 - Mon, May 4

10:35 pm - 11:45 am

BLL

SEA

22h 10m

1 stop

11:25 pm - 9:35 pm

SEA

BLL

13h 10m

1 stop

$664Icelandair

Sun, Jun 14 - Tue, Jun 23

10:00 pm - 10:38 pm

BLL

SEA

33h 38m

2 stops

8:20 pm - 7:50 pm

SEA

BLL

14h 30m

1 stop

$672British Airways

Fri, May 1 - Tue, May 5

10:00 pm - 10:38 pm

BLL

SEA

33h 38m

2 stops

8:20 pm - 7:50 pm

SEA

BLL

14h 30m

1 stop

$673British Airways

Fri, May 1 - Tue, May 5

10:00 pm - 10:38 pm

BLL

SEA

33h 38m

2 stops

8:20 pm - 12:05 pm

SEA

BLL

30h 45m

1 stop

$677British Airways

Fri, May 1 - Tue, May 5

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United Airlines flights from Billund to Seattle

Our best United Airlines deals on Billund to Seattle flight tickets

United Airlines

May 29

BLL6:00 amBillund

15h 20m

1 stop

SEA12:20 pmSeattle/Tacoma Intl

Jun 5

SEA2:10 pmSeattle/Tacoma Intl

19h 00m

1 stop

BLL6:10 pmBillund

$719

United Airlines

May 1

BLL6:00 amBillund

15h 20m

1 stop

SEA12:20 pmSeattle/Tacoma Intl

May 5

SEA2:10 pmSeattle/Tacoma Intl

15h 10m

1 stop

BLL2:20 pmBillund

$720

United Airlines

May 1

BLL6:00 amBillund

15h 20m

1 stop

SEA12:20 pmSeattle/Tacoma Intl

May 5

SEA2:10 pmSeattle/Tacoma Intl

15h 10m

1 stop

BLL2:20 pmBillund

$723

British Airways flights from Billund to Seattle

Our best British Airways deals on Billund to Seattle flight tickets

British Airways

Sep 9

BLL9:50 pmBillund

22h 45m

1 stop

SEA11:35 amSeattle/Tacoma Intl

Oct 7

SEA1:30 pmSeattle/Tacoma Intl

13h 35m

1 stop

BLL12:05 pmBillund

$523

British Airways

Sep 9

BLL9:50 pmBillund

22h 45m

1 stop

SEA11:35 amSeattle/Tacoma Intl

Oct 7

SEA3:10 pmSeattle/Tacoma Intl

37h 45m

2 stops

BLL1:55 pmBillund

$583

British Airways

May 1

BLL10:00 pmBillund

33h 38m

2 stops

SEA10:38 pmSeattle/Tacoma Intl

May 5

SEA8:20 pmSeattle/Tacoma Intl

14h 30m

1 stop

BLL7:50 pmBillund

$672

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BillundSeattle

BLL - SEA

BLLSEA

Billund

Mon 4/27

2:20 pm-11:45 am

1 stop30h 25m

Seattle/Tacoma Intl

Mon 5/4

6:40 pm-10:25 pm

1 stop18h 45m

$579

BillundSeattle

BLL - SEA

BLLSEA

Billund

Thu 4/30

6:00 am-4:30 pm

1 stop19h 30m

Seattle/Tacoma Intl

Mon 5/4

6:40 pm-10:25 pm

1 stop18h 45m

$600

Quickest round-trip

BillundSeattle

BLL - SEA

BLLSEA

Billund

Mon 4/27

11:45 am-4:30 pm

1 stop13h 45m

Seattle/Tacoma Intl

Mon 5/4

7:15 am-11:20 am

2 stops19h 05m

$617

BillundSeattle

BLL - SEA

BLLSEA

Billund

Thu 4/30

6:00 am-11:40 am

1 stop14h 40m

Seattle/Tacoma Intl

Mon 5/4

7:15 am-11:20 am

2 stops19h 05m

$620

BillundSeattle

BLL - SEA

BLLSEA

Billund

Mon 4/27

11:45 am-11:54 pm

2 stops21h 09m

Seattle/Tacoma Intl

Mon 5/4

7:15 am-11:20 am

2 stops19h 05m

$623

BillundSeattle

BLL - SEA

BLLSEA

Billund

Thu 4/30

11:45 am-9:50 pm

2 stops19h 05m

Seattle/Tacoma Intl

Mon 5/4

7:15 am-11:20 am

2 stops19h 05m

$626

BillundSeattle

BLL - SEA

BLLSEA

Billund

Sun 6/14

10:35 pm-11:45 am

1 stop22h 10m

Seattle/Tacoma Intl

Tue 6/23

11:25 pm-9:35 pm

1 stop13h 10m

$664

BillundSeattle

BLL - SEA

BLLSEA

Billund

Fri 5/1

10:00 pm-10:38 pm

2 stops33h 38m

Seattle/Tacoma Intl

Tue 5/5

8:20 pm-7:50 pm

1 stop14h 30m

$672

BillundSeattle

BLL - SEA

BLLSEA

Billund

Fri 5/1

10:00 pm-10:38 pm

2 stops33h 38m

Seattle/Tacoma Intl

Tue 5/5

8:20 pm-7:50 pm

1 stop14h 30m

$673

BillundSeattle

BLL - SEA

BLLSEA

Billund

Fri 5/1

10:00 pm-10:38 pm

2 stops33h 38m

Seattle/Tacoma Intl

Tue 5/5

8:20 pm-12:05 pm

1 stop30h 45m

$677

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 Billund to Seattle

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

Prices

Airlines

What is the typical price of a round-trip flight between Billund and Seattle?

What is the cheapest month to fly to Seattle?

In general, December is the cheapest month to fly from Billund to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $553. If you don’t want to visit Seattle in December, then you should wait until April to fly from Billund, when ticket prices are also cheap, with an average price of $589.

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Billund when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $743 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Billund for as low as $609 on momondo.

When to book flights from Billund to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Billund to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Billund to Seattle (BLL to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Billund to Seattle

Fastest flight time	14h 37m
Direct flights	None

The fastest flight from Billund to Seattle takes 14h 37m

There are no direct flights from Billund to Seattle. There are no popular flight routes from Billund to Seattle.

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Frequently asked questions about flying from Billund to Seattle

How far is Billund to Seattle/Tacoma Intl by plane?
The straight-line distance from Billund to Seattle/Tacoma Intl is 4761.2 mi. By plane, this route typically takes 14h 37m.
When did momondo last update prices for flights from Billund Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Billund Airport to Seattle/Tacoma Intl Airport are updated daily.
How many operators does momondo search for flights from Billund Airport to Seattle/Tacoma Intl Airport?
As of April 2026, there is 1 operator available to choose from for flights from Billund Airport to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Billund Airport to Seattle/Tacoma Intl Airport?
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 Billund Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Billund to Seattle?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Billund to Seattle is Lufthansa (100% of total bookings).

Best airlines flying from Billund to Seattle

Compare and see reviews for airlines that fly from Billund to Seattle with momondo

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom $595	Free Cancellation	Rating 6.8 7,926 reviews		Search Lufthansa flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Redmond

Marysville

Lakewood

Tukwila

Puyallup

Cle Elum

Federal Way

Centralia

Fife

Westport

Shoreline

Tumwater

Why use momondo?

Why should I use momondo to find a flight deal from Billund to Seattle?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Billund to Seattle. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Billund to Seattle with flexible booking policies on momondo?

Flights from Billund to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Billund to Seattle?

momondo provides multiple filters to help you find the best flight to Seattle from Billund. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Billund to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.