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$545+ 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
BLL — SEA
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Billund to Seattle/Tacoma Intl are usually found in January or February, booked 29 days in advance, depart on a Monday or Tuesday and return on a Friday

Cheap 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 September 16, 2025.

Round-trip from

$545
(British Airways)

Popular in

July

Cheapest in

January

Average price

$717
From Billund to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($129 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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Find 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 September 16, 2025.

This British Airways deal was found by Cheapflights users on 9/15. 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.
Mon 11/108:45 pmBLL - SEA
1 stop23h 45mBritish Airways
Sun 11/166:50 pmSEA - BLL
1 stop32h 30mBritish Airways
Deal found 9/15$545
This Ticket deal was found by Cheapflights users on 9/15. 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.
Mon 12/156:45 amBLL - SEA
2 stops35h 46mMultiple Airlines
Mon 12/292:00 pmSEA - BLL
1 stop14h 20mMultiple Airlines
Deal found 9/15$552
This Travelis deal was found by Cheapflights users on 9/16. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/156:45 amBLL - SEA
2 stops24h 43mLufthansa
Mon 12/292:00 pmSEA - BLL
1 stop14h 20mLufthansa
Deal found 9/16$554
This Travelis deal was found by Cheapflights users on 9/14. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/156:45 amBLL - SEA
2 stops24h 31mAir Canada
Mon 12/295:50 amSEA - BLL
2 stops22h 30mAir Canada
Deal found 9/14$568
This Lufthansa deal was found by Cheapflights users on 9/15. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/36:00 amBLL - SEA
1 stop14h 55mLufthansa
Tue 10/142:20 pmSEA - BLL
1 stop14h 40mLufthansa
Deal found 9/15$588
This Lufthansa deal was found by Cheapflights users on 9/15. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/56:00 amBLL - SEA
1 stop19h 59mLufthansa
Tue 10/142:20 pmSEA - BLL
1 stop14h 40mLufthansa
Deal found 9/15$601

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 September 16, 2025.
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

Mon 11/10

8:45 pm-11:30 am

1 stop23h 45m

Seattle/Tacoma Intl

Sun 11/16

2:46 pm-12:20 pm

2 stops36h 34m

$545

BillundSeattle

BLL - SEA

BLLSEA

Billund

Mon 12/15

6:45 am-10:28 pm

2 stops24h 43m

Seattle/Tacoma Intl

Mon 12/29

2:00 pm-1:20 pm

1 stop14h 20m

$554

BillundSeattle

BLL - SEA

BLLSEA

Billund

Mon 12/15

6:45 am-10:16 pm

2 stops24h 31m

Seattle/Tacoma Intl

Mon 12/29

5:50 am-1:20 pm

2 stops22h 30m

$568

BillundSeattle

BLL - SEA

BLLSEA

Billund

Mon 12/15

6:45 am-9:31 am

2 stops35h 46m

Seattle/Tacoma Intl

Mon 12/29

11:59 pm-1:40 pm

2 stops28h 41m

$588

BillundSeattle

BLL - SEA

BLLSEA

Billund

Sat 10/4

2:35 pm-11:55 am

1 stop30h 20m

Seattle/Tacoma Intl

Tue 10/14

2:20 pm-2:00 pm

1 stop14h 40m

$607

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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 September 12, 2025.

To ensure you get the cheapest price possible for a flight from Billund to Seattle, you should look to book at least 29 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, January is the cheapest month in which you can book a flight from Billund to Seattle (average of $238). Flying from Billund to Seattle in June is currently the most expensive (average of $387). 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.

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 September 16, 2025.
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
7,407 reviews

Boarding

7.0

Crew

7.6

Entertainment

6.4

Overall

6.8

Food

6.3

Comfort

6.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Jan 2025

FRA - TPA

I had ordered a gluten-free meal through you I double triple checked that through you got screamed at by one of your representatives. She yelled at me and said that she had ordered the mail, she had chosen my seat, and made sure that all my baggage is were paid for. That was a lie. My experience with discover airlines in and of itself was GOOD but your representative was out of line did not do anything that she screamed at me and told me she did and I literally had to call the airlines myself to get my seat selected to double check on my gluten-free meal which still was not on board and to pay for my bags which I thought that I paid for all of them until I got to the airport and I still had to pay for my check back. So cheap flights I will never use you again.
Lufthansa
6.8
Okay
7,407 reviews
Lufthansa
6.8
Okay
7,407 reviews

Boarding

7.0

Crew

7.6

Entertainment

6.4

Overall

6.8

Food

6.3

Comfort

6.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Jan 2025

FRA - TPA

I had ordered a gluten-free meal through you I double triple checked that through you got screamed at by one of your representatives. She yelled at me and said that she had ordered the mail, she had chosen my seat, and made sure that all my baggage is were paid for. That was a lie. My experience with discover airlines in and of itself was GOOD but your representative was out of line did not do anything that she screamed at me and told me she did and I literally had to call the airlines myself to get my seat selected to double check on my gluten-free meal which still was not on board and to pay for my bags which I thought that I paid for all of them until I got to the airport and I still had to pay for my check back. So cheap flights I will never use you again.

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 $545, British Airways can have you in Seattle from Billund in 23h 45m. 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 6% 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, January is the cheapest month in which you can book a flight from Billund to Seattle (average of $238). Flying from Billund to Seattle in June is currently the most expensive (average of $387). 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
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
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Shoreline

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Alternative routes for Billund to Seattle

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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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$595Average$662FlexibilityNo cancel feeOn-time76%

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