The cheapest times to fly from PDX to CJJ are

  • June 4th to October 28th (except the week of September 3rd)

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 PDX to CJJ is late October. Prices can be as high as $11200 for Friday flights during early May, or as low as $1738 for Thursday flights around late October.


When to Fly to Cheongju-si

Flying from Portland, OR (PDX) to Cheongju (CJJ) will usually cost between $2722 to $9271 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late October with an average ticket price of $2419. Due to high demand the most expensive time to fly is early May, with an average price of $9114. Planning your trip to low-cost times can easily save you $6694 on economy flights and even more on first-class flights. Generally, any price below $6511 can be considered a good price for a round-trip PDX to CJJ flight.

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

PDX to CJJ Flight Prices

Compared to other flights, the PDX to CJJ flight is more expensive than the average and costs more than the average flight leaving from Portland. The average price per mile (for a direct flight) is $0.77, which is above average.


Flight Prices by Day of the Week

Thursday is usually the cheapest day to fly to CJJ, and Tuesday the cheapest day to fly back into PDX. Fridays are the most expensive days to fly to Cheongju-si, and Wednesdays are the most expensive days to return to Portland. Selecting flights on the least expensive days could save you up to $1017 (14%) 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 $5269. Return trip prices are from the CJJ to PDX 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 PDX to CJJ can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 10 hour 28 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 PDX to CJJ while comparing.

Destination alternative #1: Incheon International Airport (ICN) in Seoul

  • 78 miles (126 km) away from CJJ
  • Usually 83.67% less expensive than CJJ
  • 1-layover flights available

See PDX to ICN flights

Destination alternative #2: Gimpo International Airport (GMP) in Seoul

  • 70 miles (113 km) away from CJJ
  • Usually 81.98% less expensive than CJJ
  • 1-layover flights available

See PDX to GMP flights

Destination alternative #3: Gimhae International Airport (PUS) in Busan

  • 133 miles (214 km) away from CJJ
  • Usually 81.05% less expensive than CJJ
  • 1-layover flights available

See PDX to PUS flights


Flight Hacking PDX to CJJ

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 PDX to CJJ — but Champion Traveler does!

Hack #1: Osaka (PDX > KIX > CJJ)

  • Price for both tickets: $1231
  • Average savings: $5280 (81.09%)

See PDX to KIX flights

Hack #2: Shanghai (PDX > PVG > CJJ)

  • Price for both tickets: $1462
  • Average savings: $5050 (77.55%)

See PDX to PVG flights

Hack #3: Beijing (PDX > PEK > CJJ)

  • Price for both tickets: $1527
  • Average savings: $4984 (76.55%)

See PDX to PEK flights


Flight Questions Answered

Still have questions about flying from PDX to CJJ? We’ve got answers.

Which airlines fly this route?

You can find 10 major airlines flying this route most often: Air Canada, Air China, Alaska, Asiana, China Eastern, China Southern, Delta, Hainan, Korean Air, United, and potentially more during busy seasons.

How far away is it from Cheongju International Airport to Portland International Airport?

The distance between the two airports is roughly 5274 miles or 8488 kilometers.

How long does it take to fly from PDX to CJJ?

The real-world flight time for a nonstop PDX to CJJ flight is about 10 hour 28 minutes.

How many flights go between Portland, OR and Cheongju?

It depends on the day of the week and the date, but a typical day might have around 14 available flights from PDX to CJJ.


Airport Location Info


Departing Airport

Origination codePDX
Origination airport namePortland International Airport
CityPortland, OR
Countrythe United States

Return Airport

Destination codeCJJ
Destination airport nameCheongju International Airport
CountrySouth Korea


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.