BLL - SEA

$522 Find Cheap Flights from Billund to Seattle

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Billund to Seattle departing on 11/20. 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, 0 bags

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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$522
Typical prices: $529-$685
Multiple Airlines
Thu 11/20Mon 11/24
BLL - SEA • 1 stop
Cheapest one-way
$1,617
Typical prices: $763-$823
United Airlines
Sat 12/20
BLL - SEA • 2 stops
Top airlines
KLM
Cheapest • from $533 (round-trip)
Lufthansa
Best reviews • 6.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 41% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 23% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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!
Flight Deals
Booking Insights
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

Thu, Nov 20 - Mon, Nov 24
Multiple Airlines Logo
6:00 am - 11:45 amBLL-SEA
14h 45m1 stop
Multiple Airlines Logo
2:05 pm - 11:00 pmSEA-BLL
23h 55m1 stop
$522Multiple Airlines
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Thu, Nov 20 - Mon, Nov 24
Multiple Airlines Logo
6:00 am - 11:45 amBLL-SEA
14h 45m1 stop
Multiple Airlines Logo
2:05 pm - 2:35 pmSEA-BLL
15h 30m1 stop
$524Multiple Airlines
Find Deal
Thu, Nov 20 - Mon, Nov 24
Multiple Airlines Logo
6:00 am - 11:45 amBLL-SEA
14h 45m1 stop
Multiple Airlines Logo
2:05 pm - 2:35 pmSEA-BLL
15h 30m1 stop
$525Multiple Airlines
Find Deal
Thu, Nov 20 - Mon, Nov 24
KLM Logo
6:00 am - 11:45 amBLL-SEA
14h 45m1 stop
KLM Logo
9:43 am - 11:20 amSEA-BLL
16h 37m2 stops
$533KLM
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Thu, Nov 20 - Mon, Nov 24
Multiple Airlines Logo
6:00 am - 11:45 amBLL-SEA
14h 45m1 stop
Multiple Airlines Logo
9:43 am - 11:20 amSEA-BLL
16h 37m2 stops
$534Multiple Airlines
Find Deal
Thu, Nov 20 - Mon, Nov 24
Lufthansa Logo
6:30 am - 6:52 pmBLL-SEA
21h 22m2 stops
Lufthansa Logo
7:00 am - 1:20 pmSEA-BLL
21h 20m2 stops
$548Lufthansa
Find Deal
Thu, Nov 20 - Mon, Nov 24
Lufthansa Logo
6:30 am - 8:54 pmBLL-SEA
23h 24m2 stops
Lufthansa Logo
7:00 am - 1:20 pmSEA-BLL
21h 20m2 stops
$552Lufthansa
Find Deal
Thu, Nov 20 - Mon, Nov 24
Delta Logo
10:25 am - 8:50 pmBLL-SEA
19h 25m2 stops
Delta Logo
7:20 am - 11:20 amSEA-BLL
19h 00m2 stops
$564Delta
Find Deal
Thu, Nov 20 - Mon, Nov 24
Air Canada Logo
6:30 am - 10:16 pmBLL-SEA
24h 46m2 stops
Air Canada Logo
5:50 am - 1:20 pmSEA-BLL
22h 30m3 stops
$631Air Canada
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Thu, Nov 20 - Mon, Nov 24
Air Canada Logo
6:30 am - 7:16 pmBLL-SEA
21h 46m3 stops
Air Canada Logo
5:50 am - 1:20 pmSEA-BLL
22h 30m3 stops
$3,812Air Canada
Find Deal
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.

How much is a round-trip flight from Billund to Seattle?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Billund to Seattle departing in November.

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 September, where the average cost of round-trip tickets is $925 and $721 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 3 weeks before departure, which saves you about 41% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Find deals

Good to know

Low seasonFebruary
Cheapest flight$522
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 44% 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 $1,617 for a one-way ticket and $522 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?

    Star Alliance is the only airline alliance operating flights between Billund and Seattle.

  • 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 7558 reviews
6.3Food
6.8Comfort
7.0Boarding
7.6Crew
6.4Entertainment
Airline reviews

Smooth flight with enough time for connection. Ran out of meal options. In-flight and gate staff were friendly and helpful. Good service overall.

10.0 ExcellentAnonymous, Nov 2025FRA - LAX
Read more Lufthansa reviews

Smooth flight with enough time for connection. Ran out of meal options. In-flight and gate staff were friendly and helpful. Good service overall.

The seat space seemed small especially when the person ahead reclined but other than that, very good.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

Give yourself over 2+ hours layover because if flight is slighlty delayed and you miss your connection, Lufthansa will do nothing for you

We would have missed our connection from Munich to Boston but we had a van outside the plan that wisked us to our terminal. Much appreciated and we didn’t even realize that Lufthansa had done this until the announcement on disembarkation. Well organized airline! Will definitely fly Lufthansa again!!!

Everything went well. I will fly with Lufthansa again. And use Kayak whenever I book flights

Bought a seat in a flight that got changed out so ended up paying for a seat I would have had if I hadn't paid.

Food was poor quality and the screens for entertainment didn’t work properly

Food was much better than my outbound flight. On-time. Good service. I had a problem with my entertainment screen, but the attendant fixed it promptly.

I think they overbooked Frankfurt to New York and bumped me off. This changed my return travel I arrived home about 4 hours late. Almost 24 total travel time Totally unacceptable Would not travel with United

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

Information on your arrival and departure airports

Billund (BLL)
Seattle (SEA)