What is the cheapest airline that flies from Seoul to Ontario?

WestJet, China Airlines, and Alaska Airlines are the most popular carriers operating from Seoul to Ontario

What airlines fly to Ontario?

AIR PREMIA, Asiana Airlines and Korean Air are the top three most popular airlines that fly to Ontario from Seoul according to our data. AIR PREMIA is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 8 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Ontario?

Average flight duration from Seoul to Ontario depends on which airport you fly into and out of. Flying from Incheon to Los Angeles is 11h 05m on average, while flying from Seoul to Los Angeles is 14h 05m on average. Los Angeles is the most popular airport in Ontario.

When did momondo last update prices for flights from Seoul to Ontario Airport?

Prices for flights from Seoul to Ontario Airport refresh daily.

How many operators does momondo search for flights from Seoul to Ontario Airport?

As of April 2025, there is 1 operator available to choose from for flights from Seoul to Ontario Airport.

How old do you have to be to fly from Seoul to Ontario Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seoul to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$432 Cheap Flights from Seoul to Ontario in 2025

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Find the cheapest flights from Seoul to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Seoul to Los Angeles.

4:50 pm - 10:45 pmICN-ONT

21h 55m1 stop

6:00 am - 3:15 pmONT-ICN

17h 15m1 stop

$517United Airlines

Find Deal

Tue, Jun 3 - Tue, Oct 28

4:50 pm - 8:53 pmICN-ONT

20h 03m2 stops

6:00 am - 3:00 pmONT-ICN

17h 00m1 stop

$519United Airlines

Find Deal

Thu, May 8 - Mon, May 12

11:30 am - 5:39 pmICN-ONT

22h 09m1 stop

3:15 pm - 4:40 amONT-ICN

21h 25m1 stop

$527United Airlines

Find Deal

Wed, May 28 - Wed, Oct 29

4:50 pm - 2:25 pmICN-ONT

13h 35m1 stop

6:00 am - 3:00 pmONT-ICN

17h 00m1 stop

$759Lufthansa

Find Deal

Fri, May 9 - Tue, May 13

4:40 pm - 9:25 pmICN-ONT

20h 45m1 stop

6:00 am - 4:40 pmONT-ICN

18h 40m1 stop

$780

Find Deal

Mon, May 19 - Wed, May 28

9:25 pm - 9:55 pmICN-ONT

16h 30m1 stop

9:50 am - 7:00 pmONT-ICN

17h 10m1 stop

$857Hawaiian Airlines

Find Deal

Fri, May 23 - Tue, May 27

8:35 pm - 6:00 pmICN-ONT

37h 25m1 stop

12:10 am - 7:35 pmONT-ICN

27h 25m1 stop

$859China Airlines

Find Deal

Mon, May 5 - Thu, May 8

8:35 pm - 6:00 pmICN-ONT

37h 25m1 stop

12:10 am - 7:35 pmONT-ICN

27h 25m1 stop

$860China Airlines

Find Deal

Wed, May 7 - Sat, May 10

9:25 pm - 9:50 pmICN-ONT

16h 25m1 stop

9:50 am - 7:00 pmONT-ICN

17h 10m1 stop

$900Hawaiian Airlines

Find Deal

Wed, May 14 - Sun, May 18

11:30 am - 12:24 pmICN-ONT

16h 54m1 stop

1:45 pm - 4:20 amONT-ICN

22h 35m1 stop

$941Lufthansa

Find Deal

Fri, May 9 - Wed, May 14

Hawaiian Airlines flights from Seoul to Ontario

Our best Hawaiian Airlines deals on Seoul to Ontario flight tickets

Hawaiian Airlines

May 23

ICN9:25 pmIncheon Intl

16h 30m

1 stop

ONT9:55 pmOntario

May 27

ONT9:50 amOntario

17h 10m

1 stop

ICN7:00 pmIncheon Intl

$857

Find similar

Hawaiian Airlines

May 14

ICN9:25 pmIncheon Intl

16h 25m

1 stop

ONT9:50 pmOntario

May 18

ONT9:50 amOntario

17h 10m

1 stop

ICN7:00 pmIncheon Intl

$900

Find similar

Hawaiian Airlines

May 23

ICN9:25 pmIncheon Intl

16h 30m

1 stop

ONT9:55 pmOntario

May 25

ONT9:50 amOntario

17h 10m

1 stop

ICN7:00 pmIncheon Intl

$911

Find similar

United Airlines flights from Seoul to Ontario

Our best United Airlines deals on Seoul to Ontario flight tickets

United Airlines

Jun 3

ICN4:50 pmIncheon Intl

21h 55m

1 stop

ONT10:45 pmOntario

Oct 28

ONT6:00 amOntario

17h 15m

1 stop

ICN3:15 pmIncheon Intl

$517

Find similar

United Airlines

May 8

ICN4:50 pmIncheon Intl

20h 03m

2 stops

ONT8:53 pmOntario

May 12

ONT6:00 amOntario

17h 00m

1 stop

ICN3:00 pmIncheon Intl

$519

Find similar

United Airlines

May 28

ICN11:30 amIncheon Intl

22h 09m

1 stop

ONT5:39 pmOntario

Oct 29

ONT3:15 pmOntario

21h 25m

1 stop

ICN4:40 amIncheon Intl

$527

Find similar

How to get the cheapest flight ticket from Seoul to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest time of day to depart on your flight to Ontario?

In the morning is the cheapest time of day to fly from Seoul to Ontario when you can find flight prices for as low as $938. Flying to Ontario in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $938 on average. Flights to Ontario from Seoul in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Seoul to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Seoul to Ontario according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Seoul to Ontario (SEL to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seoul to Ontario

Best Price Found	$432
Fastest flight time	13h 35m
Direct flights	None
Airports in Ontario	1 airport

The best one-way flight to Ontario from Seoul in the past 72 hours is $432. The best round-trip flight deal from Seoul to Ontario found on momondo in the last 72 hours is $517.

The fastest flight from Seoul to Ontario takes 13h 35m

There are no direct flights from Seoul to Ontario. Popular non-direct route for this connection is Incheon Intl Airport - Ontario Airport.

There is 1 airport near Ontario: Ontario (ONT)

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How far is Seoul to Ontario by plane?
Seoul and Ontario are 5976.3 mi apart from one another. By plane, this route typically takes 13h 35m.
When did momondo last update prices for flights from Seoul to Ontario Airport?
Prices for flights from Seoul to Ontario Airport refresh daily.
How many operators does momondo search for flights from Seoul to Ontario Airport?
As of April 2025, there is 1 operator available to choose from for flights from Seoul to Ontario Airport.
How old do you have to be to fly from Seoul to Ontario Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seoul to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Seoul to Ontario

Compare and see reviews for airlines that fly from Seoul to Ontario with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $596	Free Cancellation	Rating 7.4 8,685 reviews		Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seoul to Ontario?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seoul to Ontario. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seoul to Ontario with flexible booking policies on momondo?

Flights from Seoul to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seoul to Ontario?

momondo provides multiple filters to help you find the best flight to Ontario from Seoul. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Seoul to Ontario right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seoul to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.