The cheapest times to fly from UIO to SEA are

  • January 15th to February 11th
  • March 19th to April 22nd
  • May 21st to June 24th
  • August 20th to September 30th

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 UIO to SEA is mid to late September. Prices can be as high as $2607 for Tuesday flights during early August, or as low as $1046 for Thursday flights around mid to late September.


When to Fly to Seattle

Flying from Quito (UIO) to Seattle, WA (SEA) will usually cost between $1193 to $1610 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid to late September with an average ticket price of $1193. Due to high demand the most expensive time to fly is early August, with an average price of $1759. Planning your trip to low-cost times can easily save you $566 on economy flights and even more on first-class flights. Generally, any price below $1540 can be considered a good price for a round-trip UIO to SEA flight.

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

UIO to SEA Flight Prices

Compared to other flights, the UIO to SEA flight is more expensive than the average and costs slightly more than the average flight leaving from Quito. The average price per mile (for a direct flight) is $0.23, which is below average.


Flight Prices by Day of the Week

Thursday is usually the cheapest day to fly to SEA, and Tuesday the cheapest day to fly back into UIO. Tuesdays are the most expensive days to fly to Seattle, and Sundays are the most expensive days to return to Quito. Selecting flights on the least expensive days could save you up to $100 (7%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Thursday and returning a week later will cost an average of $1363. Return trip prices are from the SEA to UIO 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 UIO to SEA can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 8 hour 33 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 UIO to SEA while comparing.

Destination alternative #1: Portland International Airport (PDX) in Portland, OR

  • 129 miles (208 km) away from SEA
  • Usually 39.68% less expensive than SEA
  • 1-layover flights available

See UIO to PDX flights


Flight Hacking UIO to SEA

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 UIO to SEA — but Champion Traveler does!

Hack #1: San Francisco, CA (UIO > SFO > SEA)

  • Price for both tickets: $782
  • Average savings: $758 (49.22%)

See UIO to LAX flights

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

  • Price for both tickets: $796
  • Average savings: $744 (48.31%)

See UIO to SFO flights

Hack #3: Las Vegas, NV (UIO > LAS > SEA)

  • Price for both tickets: $829
  • Average savings: $712 (46.2%)

See UIO to LAS flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 10 major airlines flying this route most often: Aeromexico, Air Canada, American, Avianca, COPA, Delta, Emirates, JetBlue, LATAM, United, and potentially more during busy seasons.

How far away is it from Seattle/Tacoma International Airport to Old Mariscal Sucre International Airport?

The distance between the two airports is roughly 4208 miles or 6772 kilometers.

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

The real-world flight time for a nonstop UIO to SEA flight is about 8 hour 33 minutes.

How many flights go between Quito and Seattle, WA?

It depends on the day of the week and the date, but a typical day might have around 23 available flights from UIO to SEA.


Airport Location Info


Departing Airport

Origination codeUIO
Origination airport nameOld Mariscal Sucre International Airport

Return Airport

Destination codeSEA
Destination airport nameSeattle/Tacoma International Airport
CitySeattle, WA
Countrythe United States


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.