The cheapest times to fly from SEA to BLI are

  • January 1st to February 11th (except the week of January 29th)
  • March 5th to March 18th
  • April 16th to April 29th
  • May 21st to July 15th (except the week of June 4th)

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 BLI is mid November. Prices can be as high as $401 for Thursday flights during early May, or as low as $214 for Friday flights around mid November.


When to Fly to Bellingham

Flying from Seattle, WA (SEA) to Bellingham, WA (BLI) will usually cost between $214 to $260 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid November with an average ticket price of $214. Due to high demand the most expensive time to fly is early May, with an average price of $255. Planning your trip to low-cost times can easily save you $41 on economy flights and even more on first-class flights. Generally, any price below $217 can be considered a good price for a round-trip SEA to BLI flight.

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

SEA to BLI Flight Prices

Compared to other flights, the SEA to BLI flight is much cheaper than the average and costs much less than the average flight leaving from Seattle. The average price per mile (for a direct flight) is $1.45, which is above average.


Flight Prices by Day of the Week

Friday is usually the cheapest day to depart and return on this flight. Thursdays 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 $8 (4%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Friday and returning a week later will cost an average of $217. Return trip prices are from the BLI 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 BLI can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 1 hour 9 minutes may 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 a nonstop flight from SEA to BLI while comparing.

Destination alternative #1: Pangborn Memorial Airport (EAT) in Wenatchee, WA

  • 144 miles (232 km) away from BLI
  • Usually 12.67% less expensive than BLI
  • Nonstop flights available

See SEA to EAT flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 1 major airline flying this route most often: Alaska, and potentially more during busy seasons.

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

The distance between the two airports is roughly 93 miles or 150 kilometers.

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

The real-world flight time for a nonstop SEA to BLI flight is about 1 hour 9 minutes.

How many flights go between Seattle, WA and Bellingham, WA?

It depends on the day of the week and the date, but a typical day might have around 5 available flights from SEA to BLI.


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 BLI
Destination airport name Bellingham International Airport
City Bellingham, WA
Country the United States
Latitude 48.8
Longitude -122.5


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.