SEA - BLL

$520 Find Cheap Flights from Seattle to Billund

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Billund departing on 12/5. 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 Billund

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

Cheap Flights from Seattle to Billund (SEA-BLL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Billund 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 Seattle to Billund

Fri, Dec 5 - Sun, Dec 14
Air France Logo
2:05 pm - 11:00 pmSEA-BLL
23h 55m1 stop
Air France Logo
10:20 am - 11:50 amBLL-SEA
34h 30m1 stop
$520Air France
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Sat, Dec 6 - Sun, Dec 14
Air France Logo
3:05 pm - 5:50 pmSEA-BLL
17h 45m1 stop
Air France Logo
10:20 am - 11:50 amBLL-SEA
34h 30m1 stop
$526Air France
Find Deal
Fri, Dec 5 - Sun, Dec 14
Delta Logo
2:05 pm - 3:30 pmSEA-BLL
16h 25m1 stop
Delta Logo
2:30 pm - 10:25 pmBLL-SEA
40h 55m2 stops
$530Delta
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Sun, Dec 7 - Sun, Dec 14
Delta Logo
9:30 am - 2:35 pmSEA-BLL
20h 05m2 stops
Delta Logo
10:20 am - 8:50 pmBLL-SEA
19h 30m2 stops
$533Delta
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Fri, Mar 27 - Tue, Mar 31
Lufthansa Logo
10:05 am - 1:20 pmSEA-BLL
19h 15m2 stops
Lufthansa Logo
5:55 am - 12:20 pmBLL-SEA
15h 25m1 stop
$535Lufthansa
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Fri, Mar 27 - Tue, Mar 31
United Airlines Logo
3:00 pm - 1:20 pmSEA-BLL
14h 20m1 stop
United Airlines Logo
5:55 am - 12:20 pmBLL-SEA
15h 25m1 stop
$536United Airlines
Find Deal
Sun, Dec 7 - Fri, Dec 12
Lufthansa Logo
7:00 am - 11:10 pmSEA-BLL
31h 10m2 stops
Lufthansa Logo
6:30 am - 10:28 pmBLL-SEA
24h 58m2 stops
$551Lufthansa
Find Deal
Fri, Dec 5 - Sat, Dec 13
Scandinavian Airlines Logo
11:15 am - 2:55 pmSEA-BLL
18h 40m2 stops
Scandinavian Airlines Logo
9:55 am - 7:00 pmBLL-SEA
18h 05m2 stops
$559Scandinavian Airlines
Find Deal
Fri, Mar 27 - Tue, Mar 31
United Airlines Logo
3:00 pm - 1:20 pmSEA-BLL
14h 20m1 stop
United Airlines Logo
5:55 am - 12:20 pmBLL-SEA
15h 25m1 stop
$623United Airlines
Find Deal
Sat, Dec 6 - Sat, Dec 13
Scandinavian Airlines Logo
11:15 am - 2:55 pmSEA-BLL
18h 40m2 stops
Scandinavian Airlines Logo
9:55 am - 10:23 pmBLL-SEA
21h 28m2 stops
$2,130Scandinavian Airlines
Find Deal

Everything you should know

Top airlines
Air France
Cheapest • from $520 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
March
Cheapest • 16% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$520
Overall average: $652
Air France
Fri 12/5Sun 12/14
SEA - BLL • 1 stop
Cheapest one-way
Multiple Airlines
Thu 11/6
SEA - BLL • multi-stop
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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 Billund!
Booking Insights

KAYAK's insights & trends for Seattle to Billund flights

Get data-powered insights and trends into flights from Seattle to Billund 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 Seattle to Billund?

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

Your flight ticket price will generally be cheaper if you fly to Billund on a Friday and more expensive on a Wednesday. On your return trip to Seattle, you should consider flying back on a Monday, and avoid Thursdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Billund, 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 Seattle to Billund is March, where tickets cost $590 (return) on average. On the other hand, the most expensive months are May and January, where the average cost of round-trip tickets is $893 and $873 respectively.

Good to know

Low seasonJanuary
Cheapest flight$520
Best time to beat the crowds but there is an average 25% increase in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Seattle to Billund

When to book flights from Seattle to Billund

Are your dates flexible? Find out the best times to travel from Seattle to Billund 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 Seattle to Billund

  • What is the cheapest flight from Seattle to Billund?

    In the last 3 days, the lowest price for a flight from Seattle to Billund was $520 for a round-trip ticket.

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

    Yes, you’ll need a passport to travel to Billund from Seattle.

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

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

  • Which airline alliances offer flights from Seattle to Billund?

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

  • Which is the best airline for flights from Seattle to Billund, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from Seattle to Billund are Delta and KLM. With an average price for the route of $765 and an overall rating of 7.9, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $617 and an overall rating of 7.7.

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

    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 Seattle to Billund.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Billund from Seattle 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 Seattle to Billund?

    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 Billund with an airline and back to Seattle with another airline. Booking your flights between Seattle and BLL 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 Seattle to Billund?

    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 Billund from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Seattle to Billund

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Billund. 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 Seattle to Billund? 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.
7.9
DeltaOverall score based on 8001 reviews
7.9Entertainment
8.2Boarding
7.3Food
7.9Comfort
8.5Crew
Airline reviews

I truly love flying with Delta. They have always treated me with the upmost respect

10.0 ExcellentMAYRA, Nov 2025JFK - MIA
Read more Delta reviews

I truly love flying with Delta. They have always treated me with the upmost respect

Our flight attendant in FIRST CLASS was one of the worst I’ve ever had. She was not at all pleasant, nor particularly good at her service.

Everything went well and was good. Nothing exceptional, but no complaints either. Cheap seats are pretty comfortable.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The aircraft interior is old and tired on this aircraft. The entertainment system never worked despite the crews attempt to reset the system.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Old plane and old configuration/seats but still comfortable for a morning flight

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

KLM remains a quality flag carrier airline which maintains its standards whilst all their competitors are lowering theirs.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Trip was smooth, good drew, average meal, almost cold coffee. Excellent landing. Did not enjoy going down the stairs, walking to the gate, walking up the stairs, going a long walk to the exchange gate, and going down the stairs again to be bussed all the way where we originally landed to take our next flight! Over all an average experience. Thank you.

I booked extra leg room, due to seat neighbor i now consider extra shoulder and arm room as well. Seems like the seats shrink in width now The crew was very friendly and professional ( 100%). Food was good not great, breakfast was bad, a dry slice of bread would have been better. Facilities clean.

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

love the crews and my only problem was the delay at Frankfurt was very bad. I have travelled with Lufthansa for over 30 years now and this was cost me some planned business appointment

The flight delay made the connection a bit tight but that's outside the flight crew's control.

We just made it to our connecting flight. A long, long speed walk!

We didn't get the coffee with breakfast in the morning.. 30 mins lazer I asked flight attendant why don't we get coffee now at least.. after the breakfast..she said that captain announced possible turbulences fee minutes ago, which didn't ecplain why we didn't get it with the breakfast..breakfast was very poor btw..just little pastry which you can eat in 4 little bites. Turbulences fortunately didn't even happen.. but we didn't get that more than necessary coffee in the morning after the night flight with very poor sleep.. They just served breakfast 1 hour afzer we took off..at like 11 PM.. that doesn't make sense at all.. Also, flight attendants weren't very nice..they looked like they're not happy with their job.. :/

Lufthansa still has a good level of quality compared to US airlines, especially with respect to (1) food quality - actually tasty, (2) good French red wine - free, (3) good movie selection. Also my ticket price includes 1 free check-in luggage, while some other budget airlines sneak in an extra $150 for a checkin.

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

We were moved twice on flights to the point we weren’t even on Lufthansa anymore. We had to fly united. Lost paid extra leg room twice. To top it all off we’re forced to pay $375 and $275, respectively for you luggage that was considered sports luggage. We were told it would be Lufthansa fares l, from the united desk, AND WE DIDN'T EVEN HAVE A LUFTHANSA FLIGHT! I’ll be calling once my trip is over on October 7th to all airlines and Kayak. This was ridiculous!

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

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