The cheapest times to fly from SEA to GUM are

  • January 8th to April 8th
  • September 3rd to December 2nd

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 GUM is late September. Prices can be as high as $1894 for Saturday flights during early August, or as low as $1330 for Tuesday flights around late September.


When to Fly to Guam

Flying from Seattle, WA (SEA) to Guam, GU (GUM) will usually cost between $1343 to $1671 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late September with an average ticket price of $1355. Due to high demand the most expensive time to fly is early August, with an average price of $1653. Planning your trip to low-cost times can easily save you $297 on economy flights and even more on first-class flights. Generally, any price below $1476 can be considered a good price for a round-trip SEA to GUM flight.

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

SEA to GUM Flight Prices

Compared to other flights, the SEA to GUM flight is slightly more expensive than the average and costs slightly more than the average flight leaving from Seattle. The average price per mile (for a direct flight) is $0.16, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to GUM, and Monday the cheapest day to fly back into SEA. 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 $105 (7%) 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 $1451. Return trip prices are from the GUM 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 GUM can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 11 hour 11 minutes may not be realistic.


Flight Hacking SEA to GUM

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 GUM — but Champion Traveler does!

Hack #1: Manila (SEA > MNL > GUM)

  • Price for both tickets: $1063
  • Average savings: $413 (27.96%)

See SEA to MNL flights

Hack #2: Taipei (SEA > TPE > GUM)

  • Price for both tickets: $1259
  • Average savings: $217 (14.67%)

See SEA to TPE flights

Hack #3: Hong Kong (SEA > HKG > GUM)

  • Price for both tickets: $1278
  • Average savings: $198 (13.39%)

See SEA to HKG flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 13 major airlines flying this route most often: Air Canada, Alaska, American, ANA, Asiana, Cathay Pacific, China Airlines, Delta, Fiji Airways, Hawaiian, JAL, Korean Air, United, and potentially more during busy seasons.

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

The distance between the two airports is roughly 5667 miles or 9120 kilometers.

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

The real-world flight time for a nonstop SEA to GUM flight is about 11 hour 11 minutes.

How many flights go between Seattle, WA and Guam, GU?

It depends on the day of the week and the date, but a typical day might have around 45 available flights from SEA to GUM.


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 GUM
Destination airport name Guam International Airport
City Guam, GU
Country the United States
Latitude 13.5
Longitude 144.8


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.