BLL - SEA

$441 Find Cheap Flights from Billund to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Billund to Seattle departing on 12/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Billund to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Billund to Seattle, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Billund to Seattle (BLL-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Billund to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Billund to Seattle

Mon, Nov 3 - Sun, Nov 9
British Airways Logo
8:45 pm - 11:30 amBLL-SEA
23h 45m1 stop
British Airways Logo
6:50 pm - 12:20 pmSEA-BLL
32h 30m1 stop
$505British Airways
Find Deal
Mon, Nov 3 - Wed, Nov 12
British Airways Logo
8:45 pm - 11:30 amBLL-SEA
23h 45m1 stop
British Airways Logo
6:50 pm - 7:50 pmSEA-BLL
16h 00m1 stop
$506British Airways
Find Deal
Mon, Nov 3 - Sun, Nov 9
British Airways Logo
8:45 pm - 11:18 pmBLL-SEA
35h 33m2 stops
British Airways Logo
6:50 pm - 12:20 pmSEA-BLL
32h 30m1 stop
$510British Airways
Find Deal
Mon, Nov 3 - Sun, Nov 16
British Airways Logo
8:45 pm - 11:18 pmBLL-SEA
35h 33m2 stops
British Airways Logo
6:50 pm - 12:20 pmSEA-BLL
32h 30m1 stop
$512British Airways
Find Deal
Thu, Oct 16 - Thu, Oct 23
Lufthansa Logo
6:00 am - 11:55 amBLL-SEA
14h 55m1 stop
Lufthansa Logo
2:20 pm - 6:05 pmSEA-BLL
18h 45m1 stop
$546Lufthansa
Find Deal
Thu, Oct 23 - Thu, Oct 30
Lufthansa Logo
6:00 am - 11:55 amBLL-SEA
14h 55m1 stop
Lufthansa Logo
7:00 am - 9:45 amSEA-BLL
18h 45m2 stops
$548Lufthansa
Find Deal
Thu, Oct 16 - Thu, Oct 23
Air Canada Logo
6:00 am - 6:36 pmBLL-SEA
21h 36m2 stops
Air Canada Logo
5:30 am - 2:00 pmSEA-BLL
23h 30m2 stops
$549Air Canada
Find Deal
Mon, Nov 3 - Sun, Nov 9
 Logo
10:40 am - 10:06 pmBLL-SEA
20h 26m3 stops
 Logo
5:50 am - 1:30 pmSEA-BLL
22h 40m2 stops
Sat, Nov 8 - Fri, Nov 14
Air Canada Logo
6:45 am - 7:16 pmBLL-SEA
21h 31m2 stops
Air Canada Logo
5:50 am - 1:20 pmSEA-BLL
22h 30m2 stops
$588Air Canada
Find Deal
Tue, Nov 4 - Thu, Nov 13
United Airlines Logo
10:15 am - 11:15 pmBLL-SEA
22h 00m3 stops
United Airlines Logo
8:00 am - 9:45 amSEA-BLL
16h 45m2 stops
$593United Airlines
Find Deal

Everything you should know

Top airlines
British Airways
Cheapest • from $505 (round-trip)
Lufthansa
Best reviews • 6.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 31% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 21% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$505
Overall average: $563
British Airways
Mon 11/3Sun 11/9
BLL - SEA • 1 stop
Cheapest one-way
$441
Multiple Airlines
Wed 12/10
BLL - SEA • 3 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Booking Insights

KAYAK's insights & trends for Billund to Seattle flights

Get data-powered insights and trends into flights from Billund to Seattle to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Billund to Seattle?

The average price of all round-trip flights from Billund to Seattle clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Billund to Seattle, look for departures on Mondays and avoid leaving on a Thursday, as it's usually the priciest day. When flying back from Seattle, Friday is the cheapest day to fly and Wednesday is the most expensive.

What is the cheapest month to fly from Billund to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Billund to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Billund to Seattle is January, where tickets cost $496 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is $915 and $702 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Billund to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Billund to Seattle, you should book around 2 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$441
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 45% increase in price.
Flight from Billund to Seattle

When to book flights from Billund to Seattle

Are your dates flexible? Find out the best times to travel from Billund to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Billund to Seattle

  • What is the cheapest flight from Billund to Seattle?

    In the last 3 days, the lowest price for a flight from Billund to Seattle was $441 for a one-way ticket and $505 for a round-trip.

  • Do I need a passport to fly between Billund and Seattle?

    Yes

  • Which airports will I be using when flying from Billund to Seattle?

    Billund airport is called Billund and the only airport in Seattle is Seattle/Tacoma Intl.

  • Which aircraft models fly most regularly from Billund to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Billund to Seattle?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Billund and Seattle, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Billund to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Billund to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Billund to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Billund is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Billund to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Billund with another airline. Booking your flights between Billund and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Billund to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Billund up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Billund to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Billund to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Billund to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.8
LufthansaOverall score based on 7409 reviews
6.8Comfort
6.4Entertainment
6.3Food
7.6Crew
7.0Boarding
Airline reviews

Food could have something without dairy, I couldn't eat anything. Tv for both seats was malfunctioning. They have one bottle of ginger ale for entire plane.... and I paid extra for these seats...very disappointed

4.0 OkayAnonymous, Sep 2025FRA - IAD
Read more Lufthansa reviews

Food could have something without dairy, I couldn't eat anything. Tv for both seats was malfunctioning. They have one bottle of ginger ale for entire plane.... and I paid extra for these seats...very disappointed

The flight and crew were good. The customer experience on the ground could have been better. We had to reschedule our flight because of a delay on the previous flight. The attendants working the desk in Washington DC were not helpful. They told us to scan a QR code and that would get us rebooked. Why couldn't two people standing at their computers do this? We had to chat with someone to get everything figured out. It was extremely confusing.

We took two long flights with Lufthansa, both were delayed making us miss our connecting flights. Lufthansa took care of the first one. The second was a switch to United and figuring out how to rebook was not a pleasant experience.

It was chaotic. It was overbooked so we didn't have seats until the end but they turned out to be good seats. The gate was at the end of the airport. We had to get busses to the tarmac and board. It just seemed chaotic. Flight was OK. Food was not so good. Lufthansa used to be such a great airline and now as it's with everything else: If you have money you get comforts but if you don't then you end up below deck with the rest of the cattle.

Welp - they boarded us appropriately...then had us sit on the plane for over two hours before cancelling the flight...which meant another night in Munich. I probably had it a little better than most as over 500 people had to be accommodated/re-booked etc. The next day I boarded the same flight (for which I had now been ticketed 3 straight days) and - with "only" an hour delay, managed to finally get home over 2 days later than scheduled. I haven't flown Lufthansa to Europe in years...and I won't be looking to do so again in the future. To be clear, though, the people I interacted with - flight crew, Service Center, check-in were all professional and courteous - management is clearly to blame for their lack of communication and unpreparedness for when things go wrong.

It was a short flight, everything was good with it.

Flight was delayed over one hour and I had to pay to select my seat, even though my booking supposedly had free selection (I paid extra for this at time of booking)

Both flights were delayed over 1 hour. And I had to pay for seats, even though my reservation supposedly included free seat selection.

The male attendant has zero personality. It seemed like he was over worked or hated his job, not once did he smile or made any contact with the people on the plane. Strictly business and call it a day!

Seat very cramped, could not recline. No cheese with meal. Staff very helpful.

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

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