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$507+ Cheap flights from Billund (BLL) to Seattle (SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
BLL — SEA
feb. 26 — mar. 51
jue. 2/26
jue. 3/5
1 adult, Economy
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Cheap flight deals from Billund to Seattle

Cheapest flights from Billund to Seattle
Explore the most affordable flight options available from Billund to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 27, 2026.

This Ticket deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/261:00 pm
BLL
-
SEA
2 stops19h 04m
British Airways
mar. 3/31:25 pm
SEA
-
BLL
1 stop14h 05m
British Airways
Deal found 1/26$507
This Ticket deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/266:00 am
BLL
-
SEA
1 stop14h 40m
Air France
mar. 3/31:40 pm
SEA
-
BLL
1 stop24h 20m
Air France
Deal found 1/27$525
This British Airways deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/308:50 pm
BLL
-
SEA
2 stops30h 40m
British Airways
mar. 11/31:25 pm
SEA
-
BLL
1 stop14h 05m
British Airways
Deal found 1/25$560
This Delta deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/116:00 am
BLL
-
SEA
2 stops21h 46m
Delta
mié. 3/186:00 am
SEA
-
BLL
2 stops19h 40m
Delta
Deal found 1/24$567
This Delta deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/266:00 am
BLL
-
SEA
1 stop14h 40m
Delta
mar. 3/31:40 pm
SEA
-
BLL
1 stop15h 55m
Delta
Deal found 1/27$614

Find flight deals from Billund to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Billund (BLL) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated enero 27, 2026.

Round-trip from

$507
(Ticket)

Popular in

July

Cheapest in

December

Average price

$780
From Billund to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($124 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Billund to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated enero 27, 2026.
Use the filters below to find and compare flights from Billund to Seattle that are best for you.

Fly from

Billund

Fly to

Seattle

Route

Depart

Return

Price

BillundSeattle

BLL - SEA

BLLSEA

Billund

jue. 2/26

1:00 pm-11:04 pm

2 stops19h 04m

Seattle/Tacoma Intl

mar. 3/3

1:25 pm-12:30 pm

1 stop14h 05m

$507

BillundSeattle

BLL - SEA

BLLSEA

Billund

jue. 2/26

6:00 am-11:40 am

1 stop14h 40m

Seattle/Tacoma Intl

mar. 3/3

1:40 pm-11:00 pm

1 stop24h 20m

$525

BillundSeattle

BLL - SEA

BLLSEA

Billund

mié. 3/11

6:00 am-12:35 pm

1 stop14h 35m

Seattle/Tacoma Intl

mié. 3/18

6:00 am-9:40 am

2 stops19h 40m

$561

BillundSeattle

BLL - SEA

BLLSEA

Billund

jue. 2/26

6:00 am-11:40 am

1 stop14h 40m

Seattle/Tacoma Intl

mar. 3/3

1:40 pm-2:35 pm

1 stop15h 55m

$614

BillundSeattle

BLL - SEA

BLLSEA

Billund

jue. 2/12

6:30 am-12:10 pm

1 stop14h 40m

Seattle/Tacoma Intl

lun. 2/16

7:00 am-9:40 am

2 stops17h 40m

$617

BillundSeattle

BLL - SEA

BLLSEA

Billund

jue. 2/12

6:30 am-11:25 am

1 stop13h 55m

Seattle/Tacoma Intl

lun. 2/16

2:15 pm-2:35 pm

1 stop15h 20m

$619

BillundSeattle

BLL - SEA

BLLSEA

Billund

jue. 2/12

6:30 am-11:14 am

2 stops37h 44m

Seattle/Tacoma Intl

lun. 2/16

11:59 pm-1:40 pm

2 stops28h 41m

$623

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Best time to book a flight from Billund to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Billund with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Billund to Seattle

How far ahead should I book a flight from Billund to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Billund to Seattle. Price data was last updated on January 23, 2026.

To ensure you get the cheapest price possible for a flight from Billund to Seattle, you should look to book at least 24 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Billund to Seattle?

Currently, March is the cheapest month in which you can book a flight from Billund to Seattle (average of $494). Flying from Billund to Seattle in July is currently the most expensive (average of $614). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Billund to Seattle?

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated enero 27, 2026.
Read through reviews of airlines operating flights from Billund to Seattle, such as Lufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Lufthansa
6.8
Okay
7,748 reviews

Overall

6.8

Comfort

6.8

Boarding

7.0

Entertainment

6.4

Crew

7.6

Food

6.3

Reviews

1 / 20
4.0
Okay

Djermouli,Dec 2025

FRA - SFO

I’m sorry the worst airline united food sales I’m diabetic plus high cholesterol pls seats it’s not comfortable plus screen tv broke I try to charge my phone don’t work I’m not flying with united airlines
Lufthansa
6.8
Okay
7,748 reviews
Lufthansa
6.8
Okay
7,748 reviews

Overall

6.8

Comfort

6.8

Boarding

7.0

Entertainment

6.4

Crew

7.6

Food

6.3

Reviews

1 / 20
4.0
Okay

Djermouli,Dec 2025

FRA - SFO

I’m sorry the worst airline united food sales I’m diabetic plus high cholesterol pls seats it’s not comfortable plus screen tv broke I try to charge my phone don’t work I’m not flying with united airlines

Related info for your journey

Find useful and relevant information for your journey from Billund to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Billund to Seattle?

    For as low as $525, British Airways can have you in Seattle from Billund in 14h 40m. The distance from Billund to Seattle is about 4771 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Billund to Seattle round-trip?

    Cheapflights users have booked flights from Billund to Seattle round-trip from $595. Lufthansa is priced at 13% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Billund to Seattle that include hotel bookings?

    Yes. In addition to deals on Billund to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Billund to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Billund to Seattle.

  • Can I find deals for business class flights from Billund to Seattle?

    Yes. Cheapflights offers flight deals from Billund to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Billund to Seattle?

    Currently, March is the cheapest month in which you can book a flight from Billund to Seattle (average of $494). Flying from Billund to Seattle in July is currently the most expensive (average of $614). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Renton
Puyallup
Kirkland
Kent
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Billund to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Copenhagen to Seattle flights
Copenhagen to Portland flights

Top airline flying from Billund to Seattle

Discover the top airline that operate flights from Billund to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated enero 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$595Average$662FlexibilityNo cancel feeOn-time76%

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