The cheapest times to fly from SEA to BLL are

  • January 8th to March 25th
  • April 23rd to June 17th (except the week of April 30th)
  • October 22nd to December 9th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from SEA to BLL is early June. Prices can be as high as $1448 for Saturday flights during early August, or as low as $470 for Tuesday flights around early June.


When to Fly to Billund

Flying from Seattle, WA (SEA) to Billund (BLL) will usually cost between $517 to $1128 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early June with an average ticket price of $561. Due to high demand the most expensive time to fly is early August, with an average price of $1175. Planning your trip to low-cost times can easily save you $614 on economy flights and even more on first-class flights. Generally, any price below $750 can be considered a good price for a round-trip SEA to BLL flight.

See below for a graph of average weekly prices for the SEA to BLL route. All prices are for round-trip tickets in USD.

SEA to BLL Flight Prices

Compared to other flights, the SEA to BLL flight is cheaper than the average and costs less than the average flight leaving from Seattle. The average price per mile (for a direct flight) is $0.1, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $115 (13%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $746. Return trip prices are from the BLL to SEA flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from SEA to BLL can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 9 hour 34 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from SEA to BLL while comparing.

Destination alternative #1: Kastrup Airport (CPH) in Copenhagen

  • 137 miles (220 km) away from BLL
  • Usually 6.47% less expensive than BLL
  • 1-layover flights available

See SEA to CPH flights


Flight Hacking SEA to BLL

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from SEA to BLL — but Champion Traveler does!

Hack #1: London (SEA > LHR > BLL)

  • Price for both tickets: $608
  • Average savings: $142 (18.95%)

See SEA to LHR flights

Hack #2: Los Angeles, CA (SEA > LAX > BLL)

  • Price for both tickets: $687
  • Average savings: $63 (8.41%)

See SEA to LAX flights

Hack #3: Manchester (SEA > MAN > BLL)

  • Price for both tickets: $740
  • Average savings: $10 (1.27%)

See SEA to MAN flights


Flight Questions Answered

Still have questions about flying from SEA to BLL? We’ve got answers.

Which airlines fly this route?

You can find 24 major airlines flying this route most often: Air Canada, Air France, Alaska, Alitalia, American, atlasglobal, Austrian, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue, KLM, LOT, Lufthansa, SAS, Singapore Airlines, SWISS, TAROM, Turkish Airlines, United, Virgin Atlantic, and potentially more during busy seasons.

How far away is it from Billund Airport to Seattle/Tacoma International Airport?

The distance between the two airports is roughly 4773 miles or 7681 kilometers.

How long does it take to fly from SEA to BLL?

The real-world flight time for a nonstop SEA to BLL flight is about 9 hour 34 minutes.

How many flights go between Seattle, WA and Billund?

It depends on the day of the week and the date, but a typical day might have around 13 available flights from SEA to BLL.


Airport Location Info


Departing Airport

Origination code SEA
Origination airport name Seattle/Tacoma International Airport
City Seattle, WA
Country the United States
Latitude 47.5
Longitude -122.3

Return Airport

Destination code BLL
Destination airport name Billund Airport
City Billund
Country Denmark
Latitude 55.7
Longitude 9.2


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.