Find Cheap Flights from Seoul to Southeast Asia – Compare and Save

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KAYAK's insights & trends for Seoul to Southeast Asia flights

Get data-powered insights and trends into flights from Seoul to Southeast Asia to help you find the cheapest flights, the best time to fly, and much more.

What is the cheapest Seoul to Southeast Asia flight route?

The cheapest ticket to Southeast Asia from Seoul found in the last 5 days was to Bangkok, at S$ 98 return. The most popular route is from Incheon Intl Airport (ICN) to Singapore (SIN), and the cheapest return airline ticket found on this route in the last 5 days was S$ 166.

What is the cheapest time of day to fly to Southeast Asia?

The cheapest time of day to fly to Southeast Asia is generally in the morning, when retur flights cost S$ 386 on average. Morning departures are around 6% cheaper than evening flights, on average. The most expensive time of day to fly to Southeast Asia is generally at night, which is peak travel time and where the average cost of a ticket is S$ 715.

Can I save money by flying with a stopover from Seoul to Southeast Asia?

No, with an average price for the route of S$ 617, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Seoul to Southeast Asia?

The cheapest month for flights from Seoul to Southeast Asia is September, when tickets cost S$ 300 (return) on average. On the other hand, the most expensive months are February and July, when the average cost of return tickets is S$ 411 and S$ 406 respectively.

What’s the cheapest day of the week to fly from Seoul to Southeast Asia?

If you are looking for a flight deal from Seoul to Southeast Asia, look for departures on Sundays and avoid leaving on a Tuesday, as it's usually the priciest day. When flying back from Southeast Asia, Monday is the cheapest day to fly and Friday is the most expensive.

How far in advance should I book a flight from Seoul to Southeast Asia?

To get a below-average price on a flight from Seoul to Southeast Asia, you should book around 3 weeks before departure, which saves you about 24% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low season

June
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly (5% more expensive on average)

Flights from Seoul to Southeast Asia: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Seoul to Southeast Asia 
Kent ThienFlew with Korean Air-Feb 2025
You have to prepare for the waiting time for immigration to Vietnam, it takes 3 hrs to go thru and it is easy to get mad of it
TomFlew with Asiana Airlines-Jul 2024
We spent our long layover in the transit hotel in terminal 1 of Incheon Airport. The room was small, but was also very clean and well kept. I'd highly recommend this hotel if you have a long layover. The price wasn't bad at all.

FAQs - booking Southeast Asia flights

  • How does KAYAK find such low prices on flights from Seoul to Southeast Asia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seoul to Southeast Asia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seoul to Southeast Asia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Seoul to Southeast Asia is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seoul to Southeast Asia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Seoul to Southeast Asia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seoul to Southeast Asia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Seoul to Southeast Asia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines flying from Seoul to Southeast Asia

 
Need help choosing which airline to fly with from Seoul to Southeast Asia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
Korean AirOverall score based on 1219 reviews
8.1Food
8.3Comfort
8.5Boarding
8.2Entertainment
8.7Crew
Airline reviews

Very long flight time. Still better than a connection flight. Staff is very good at service. Vegetarian food is not very good.

8.0 ExcellentGary, Apr 2026
Read more Korean Air reviews

Very long flight time. Still better than a connection flight. Staff is very good at service. Vegetarian food is not very good.

The business class is excellent. I loved the food, and the crew was very attentive and professional. From boarding to arrival, everything felt smooth and well-organised.

Lousy entertainment system. Crews are excellent. Meal is just mediocre.

Aircraft is pretty old. Seat is not comfortable. Meal quality is disappointing. Entertainment system is not impressive at all.

Great service and comfort level. You can have more of vegetarian food options.

It’s great, long flight and arrive safe at destination

Everything was excellent as I expected. They also had a very caring crew. I had a headache and asked a Tylenol. The crew members kept checking with me how I was doing.

I can't believe they put my wife and I in the two middle seats! It is a very long flight and we had single flyers on either side of us blocking the way to the bathroom! There's no reason to not give one of us the isle seat so we could have managed bathroom needs and snacks with convenience. So I think very poorly of Korean air to put us both in the middle, I've never had that happen before and will probably avoid this airline in the future because of this. We tried to have them change it but they didn't so you pretty much lost a customer because of it.

There could have been better spacing of the passengers, it was crowded in some parts of the plane then other while rows were empty

Plane took off on time and I had the whole row to myself!

Had to take a shuttle bus from boarding gate to the plane and climb steps to the plane. I already knew 737-Max 8 was a small plane with only two toilets at the back for the entire economy cabin. If you sit among the last 5-6 rows closer to the toilet you will have passengers standing at the single aisle queuing to go toilet next to you as there could be more than 5-6 of them waiting at each time especially after meals. That said the crew was prompt to ensure the toilets were checked and in good order at intervals and they remained clean for use. The plane ride took close to 6 hours rather than 6.5h and despite taking off late some 25 minutes we arrived ahead of the scheduled time due to a shorter flight duration. In-Flight was challenging due to narrow aisle and quite slow. Food for breakfast was served rather late and a bit of rice grains were not fully cooked. good variety of juices and fruits + yogurt served. Flight was smooth.

It is not so much I had bad experience with Singapore Airlines, but with Kayak and particularly Underpricer. My wife and my seat arrangements were changed some times after we booked our tickets and reserved our seats I February 14, 2026. However, after our arrival we realized that we were separated and sitting in different isles. Our return tickets indicated the same. Our several calls to your Underpricer customer care were useless as they cared how much they could charge us rather than actually help us. At the end they referred us to Singapore Airlines. If that was the solution, why did I have to call your Underpricer customer care. I will definitely erase your app from my phone and I will never use Kayak for future traveling. After all, there are so many agencies that I can use other than your company.

I purchased my two tickets on February 2025. Tickets were by each other, aisle and window. However, when we were boarded the assigned seats were one by the window and the other one in the middle of the four seated row. It was a horrible experience and we had to tolerate 17 hours of flight seating by different people. If the airline changes the seat arrangement, it should have the decency to notify the passengers in advance. I have checked my return tickets to Los Angeles, and I have noticed that they are not by each other and I don’t know what to do. I hope someone contacts me and rectify this mistake.

The A350 3-3-3 configuration is cramped and uncomfortable. The seats dig in to the contact points with your body. The aisles are now too narrow for passengers and crew to pass with ease. I was in an seat but the passenger in front was laid back for the majority of the flight meaning I had to do the same. There was a kid in the seat next to me who wriggled all night which kept waking me up. If fact there were too many kids on board - why weren't they at school? Babies crying too. It was like a Kindergarten. Singapore Airlines in barely getting above Jetstar these days. It seems to have gone downhill since merging with Air India, The evening meal of fish and noodles was average. the morning breakfast of a pie was poor. At least the alcohol flow kept some sanity. The film choice was good, but I'd already seen the good stuff on the way out. The crew are still amazing and the service set the airline apart. A shame about the packed plane with inconsiderate passengers.

Pleasant business class flight experience with good onboarding experience. Flight service team was excellent with usual book-the-chef menu available

The premium economy seats were not that great. It could have been more premium than economy seats.

They were able to assist my elderly father and myself after not being able to check in to scoot. The counter service was phenomenal. They did what they could to get us on the next plane so we could catch our Connecting flight. Scoot closed early on us so we ended up missing our flight.

They close their counter so early. I had internet issues so I couldn’t check In online . I would have made the flight but their counter was closed 5 minutes before we arrived. No way of contacting them even though I had the confirmation number and tried to check in the night before on someone else’s phone. I tried calling their customer service with no pick up. Horrible experience, I’m very unhappy with them. I hope to never fly with them ever again. It costed me almost $900.

Please have the artiste showcase of classic international movies. Please have better food. There was no dessert or yogurt in my Ind Veg meal.

More Baggage limit Alternative of virtual check in at airport , prefer personal touch with “real person”check in counter for baggage drop

Tightest knee space ever experienced on any budget airline. Crew polite and efficient, take off and arrival on time. Surprised that they did not offer water on flight except as sales product. Questions about Food and entertainment not applicable since neither are offered.

At the boarding gate, Jeju airline accepted "carry on" bags for checking in for free due to the "limited cabin space". This is because most passengers were carrying multiple bags that exceed the size and weight limit for carry on items. Rather than inspecting carry-on bags at the counter and requiring excess bags to be checked in for a fee, they allowed freeloading at the boarding gate to to the detriment of those who paid the fee for checked bags. This is totally unfair.

As posred earlier the crew was very accommodating & professional. Thank You Allen

All though you can not help it the kids was loud and unruly, The crew was very accommodating and professional. Thank You Allen.

No priority counter check in for families with young children.

The flight was delayed from GUM to ICN, there was no notification on how delayed the flight would be. Although we received notice, there was no specified time given. The flight was also very uncomfortable.

Amazing experience, tonnes of leg room, great crew and smooth flight. Especially for this price for business class.

Great Value with Tway Airlines I highly recommend flying with Tway Airlines—especially if you're looking for a budget-friendly option. While the lowest fare comes with limited luggage allowance, it suited me perfectly since I was traveling light. Check-in and boarding were impressively fast and hassle-free. The ground staff and cabin crew were exceptionally polite and courteous throughout the journey. Although the aircraft was an older model and lacked inflight entertainment, this was a minor trade-off considering the ticket cost was nearly 70% lower than typical fares on the ICN–FRA route. If you're focused on value and efficiency over luxury, Tway delivers a smooth and pleasant experience.

I liked cleanliness, comfort, kind staff. I thought communication about meals could be better. We did not know how we were supposed to ensure we had food and drinks in our booking

ok flight, but charged for everything. water, food, baggage. no free water available, I had to plead to give me water to take medicine.

Need to consider about zero entertainment services and lack of flight information!

I can't board the 2nd flight due to the last 1st flight. In the 1st flight check-in, I can't board due to the stupid problem of K-ETA visa. The booking system and the flight company should inform the customer a few days earlier. This is the worse experience in my life. I won't use KAYAK and the airline anymore. My friends were also surprised about this stupid situation. I won't use KAYAK and T'way anymore.

I can't board the flight due to the K-ETA problem. You should inform the customer clearly a few days before the flight. I can't cancel/change the flight now. This is the worst experience in my life. I also never hear about this kind of bad experience. I won't use the booking system and the flight company anymore.

Flawless and ontime departure, pity about the fog at Qingdao, we circled for 90 mins

Boarding was not as per sequence Light snacks were not available Window had hair oil stains and water condensation

Uncoordinated boarding, seat comfort is terrible, even toilet is so small that overweight people wouldn't fit in. Baggage scam with additional fees. Stay away from this airline.

Boarding took forever. It's also weird that we paid more (for preferred seats) to get on the plane last. Inflight WiFi never worked the entire trip. I want my money back.

The cosmetic condition was pretty run down. The carpets were badly worn out. Even the paint on the wings was chipped and peeled! Looks like they are running these 787s to the ground..

Not clear why boarding passes could only be issued at the counter and not through the kiosk. I had already check-in on the web, so waiting to obtain a boarding pass 1.5 hours before the actual flight defeats the purpose of early web check-in.

We were delayed, but there was never any update given. Everyone was standing at the gate as boarding was supposed to commence at 13:10 for a 13:55 flight. We didn't actually start getting on the shuttles to the plane, until after 14:00. No updates, no information given at all.

Scoot refused to change my flight even though I had booked a flexible ticket. MyTrip wanted to charge me an extra $271 for a ticket that was only listed as $217. I complained about this to scoot and they didn't give a shite. So never again will you be getting money from me Scoot. You can Scoot off.

It was a cheaper flight and it arrived early. I thought the crew were pretty noisy for an overnight flight, and my friend was not able to sleep because of the noise. Also I think it’s absurd they don’t provide complementary water. Why does everything have to be a surcharge? Airplanes are dehydrating and it would be beneficial to help passengers stay healthy.

Instead of the flight attendants talking to each other they should have been monitoring the passengers. The person beside me took a phone call literally 30 seconds before the plane landed. As we were going down the runway ( from landing ) a person in the row in front of me and behind me made phone calls; CRAZY

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