Cheap Flights from Seattle (SEA) to Cheongju (CJJ)

Popular airlines from Seattle-Tacoma International Airport (SEA) to Cheongju (CJJ-Cheongju Intl.)

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Flights from Seattle (SEA) to Cheongju (CJJ)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Cheongju Intl.
Distance
5205 mi

Seattle to Cheongju Flights

The cheapest times to fly from Seattle to Cheongju

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Cheongju are during the month of . You can find some of the cheapest flights from Seattle to Cheongju with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Cheongju

Sunday is one of the best days to book for cheap flights from Seattle to Cheongju: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Cheongju

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Cheongju in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Cheongju flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Cheongju airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Cheongju Intl. Airport (CJJ) cost?
Lock in a cheap one-way flight or cheap return flight from Seattle - Tacoma Intl. Airport (SEA) to Cheongju Intl. Airport (CJJ) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Cheongju Intl. Airport (CJJ)?
Traveling in is a good way to save, as it's the cheapest month for flights between SEA and CJJ. You'll often find the lowest prices during off-peak months.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Cheongju Intl. Airport (CJJ)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SEA to CJJ flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Cheongju Intl. Airport (CJJ)?
Direct flights from Seattle - Tacoma Intl. Airport (SEA) to Cheongju Intl. Airport (CJJ) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SEA to CJJ?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Cheongju Intl. Airport (CJJ)?
To avoid potential delays on the Seattle - Tacoma Intl. Airport (SEA) to Cheongju Intl. Airport (CJJ) route, fly before 3 PM. Departures after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Cheongju Intl. Airport (CJJ) last-minute?
Last-minute bookings from SEA to CJJ are usually more expensive. To secure the lowest rates, start searching for flights well in advance. That being said, if you're flexible with your travel plans, it's possible to land a cheap ticket right before your journey.
Is it cheaper to book a SEA to CJJ flight and hotel package?
Opting for a SEA to CJJ flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Pick from our impressive range of hotels and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Cheongju Intl. Airport (CJJ)?
If you reserved your SEA to CJJ flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

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