$425 Cheap Flights from Udon Thani (UTH) to Seoul (ICN)

View $425 flight on Fri, Nov 28, 2025Opens in a new window

Popular airlines from Udon Thani (UTH-Udon Thani Intl.) to Incheon Intl. Airport (ICN)

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Udon Thani to Seoul (UTH-ICN)

Prices were available within the past 7 days and start at $425 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Udon Thani (UTH) to Seoul (ICN)
Origin airport
Udon Thani Intl.
Destination airport
Incheon Intl.
Distance
1995 mi

Udon Thani to Seoul Flights

The cheapest times to fly from Udon Thani to Seoul

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 Udon Thani to Seoul are during the month of . You can find some of the cheapest flights from Udon Thani to Seoul with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Udon Thani to Seoul

Sunday is one of the best days to book for cheap flights from Udon Thani to Seoul: 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 Udon Thani to Seoul

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 Udon Thani to Seoul in 2025. You can also book with separate airlines for your outbound and return journeys, from $425 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 Udon Thani to Seoul 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 Udon Thani to Seoul 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 Udon Thani Intl. Airport (UTH) to Incheon Intl. Airport (ICN) cost?
Lock in a cheap one-way flight from $425 or cheap return flight from Udon Thani Intl. Airport (UTH) to Incheon Intl. Airport (ICN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Udon Thani Intl. Airport (UTH) to Incheon Intl. Airport (ICN)?
The cheapest month to fly from UTH to ICN is , when demand is low. Off-peak season is usually when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Udon Thani Intl. Airport (UTH) to Incheon Intl. Airport (ICN)?
To find the cheapest airline flying from UTH to ICN, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Udon Thani Intl. Airport (UTH) to Incheon Intl. Airport (ICN)?
Nonstop flights from Udon Thani Intl. Airport (UTH) to Incheon Intl. Airport (ICN) aren't available daily, so you'll have 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 UTH to ICN?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can vary based on various factors, such as the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Udon Thani Intl. Airport (UTH) to Incheon Intl. Airport (ICN)?
To land at Incheon Intl. Airport (ICN) on schedule, book a flight that leaves Udon Thani Intl. Airport (UTH) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Udon Thani Intl. Airport (UTH) to Incheon Intl. Airport (ICN) last-minute?
Last-minute fares from UTH to ICN are typically more expensive. To lock in the lowest prices, start searching for flights ahead of time. That being said, if you're flexible with your travel dates, it's possible to land a cheap fare right before you leave.
Is it cheaper to book an UTH to ICN flight and hotel package?
Compared with arranging hotels and flights separately, booking an UTH to ICN flight and hotel package with Expedia could result in significant savings. What's more, having everything in one easy place will take the hassle out of travel planning. Just secure your flights and select from our extensive range of hotels, then personalize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Udon Thani Intl. Airport (UTH) to Incheon Intl. Airport (ICN)?
If you reserved your UTH to ICN flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

Explore a world of travel with Expedia

*Available to One Key members.