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Cheap flights from Seoul to Los Angeles from $478

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seoul to Los Angeles departing on 8/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Seoul to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
12:45 pm - 12:01 pm
ICN
-
ONT
16h 16m
1 stop
United Airlines Logo
6:00 am - 4:15 pm
ONT
-
ICN
17h 15m
1 stop
$789United Airlines
Mon, Nov 9 - Tue, Nov 17
United Airlines Logo
11:30 am - 12:12 pm
ICN
-
ONT
16h 42m
1 stop
United Airlines Logo
5:00 am - 4:20 am
ONT
-
ICN
31h 20m
2 stops
$792United Airlines
Wed, Aug 19 - Wed, Aug 26
United Airlines Logo
11:30 am - 12:12 pm
ICN
-
ONT
16h 42m
1 stop
United Airlines Logo
6:08 am - 3:00 pm
ONT
-
ICN
16h 52m
1 stop
$793United Airlines
Thu, Aug 20 - Sun, Aug 30
United Airlines Logo
11:30 am - 12:50 pm
ICN
-
ONT
41h 20m
2 stops
United Airlines Logo
9:01 am - 4:20 am
ONT
-
ICN
27h 19m
1 stop
$796United Airlines
Fri, Aug 14 - Tue, Aug 18
United Airlines Logo
12:45 pm - 12:29 pm
ICN
-
ONT
16h 44m
1 stop
United Airlines Logo
1:35 pm - 5:40 am
ONT
-
ICN
23h 05m
1 stop
$801United Airlines
Thu, Nov 5 - Sun, Nov 8
United Airlines Logo
12:45 pm - 12:01 pm
ICN
-
ONT
16h 16m
1 stop
United Airlines Logo
1:52 pm - 5:40 am
ONT
-
ICN
22h 48m
1 stop
$822United Airlines
Sat, Nov 7 - Sun, Nov 15
United Airlines Logo
11:30 am - 6:16 pm
ICN
-
ONT
22h 46m
1 stop
United Airlines Logo
5:00 am - 4:20 am
ONT
-
ICN
31h 20m
2 stops
$826United Airlines
Wed, Aug 19 - Fri, Aug 21
United Airlines Logo
11:30 am - 8:01 pm
ICN
-
ONT
24h 31m
1 stop
United Airlines Logo
6:08 am - 3:00 pm
ONT
-
ICN
16h 52m
1 stop
$827United Airlines
Fri, Aug 21 - Fri, Aug 28
Asiana Airlines Logo
4:50 pm - 8:01 pm
ICN
-
ONT
19h 11m
1 stop
Asiana Airlines Logo
7:13 pm - 4:20 am
ONT
-
ICN
17h 07m
1 stop
$849Asiana Airlines
Thu, Aug 20 - Thu, Aug 27
Multiple Airlines Logo
7:20 am - 6:40 pm
GMP
-
ONT
27h 20m
2 stops
Multiple Airlines Logo
12:10 am - 1:45 pm
ONT
-
GMP
21h 35m
2 stops
$1,165Multiple Airlines
Sat, Sep 12 - Fri, Sep 18

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China Airlines flights from Seoul to Ontario

Our best China Airlines deals on Seoul to Ontario flight tickets
China Airlines
Oct 23
ICN12:35 pmIncheon Intl
21h 25m
1 stop
ONT6:00 pmOntario
Oct 25
ONT11:50 pmOntario
19h 30m
1 stop
ICN11:20 amIncheon Intl
$952
China Airlines
Nov 2
ICN8:15 pmIncheon Intl
37h 50m
1 stop
ONT5:05 pmOntario
Nov 13
ONT10:50 pmOntario
27h 25m
1 stop
ICN7:15 pmIncheon Intl
$956
China Airlines
Oct 14
ICN8:35 pmIncheon Intl
37h 25m
1 stop
ONT6:00 pmOntario
Oct 20
ONT12:10 amOntario
27h 25m
1 stop
ICN7:35 pmIncheon Intl
$957

United Airlines flights from Seoul to Ontario

Our best United Airlines deals on Seoul to Ontario flight tickets
United Airlines
Oct 8
ICN11:30 amIncheon Intl
14h 53m
1 stop
ONT10:23 amOntario
Oct 26
ONT6:36 pmOntario
18h 04m
1 stop
ICN4:40 amIncheon Intl
$789
United Airlines
Aug 19
ICN11:30 amIncheon Intl
16h 42m
1 stop
ONT12:12 pmOntario
Aug 26
ONT5:00 amOntario
31h 20m
2 stops
ICN4:20 amIncheon Intl
$792
United Airlines
Aug 20
ICN11:30 amIncheon Intl
16h 42m
1 stop
ONT12:12 pmOntario
Aug 25
ONT6:08 amOntario
16h 52m
1 stop
ICN3:00 pmIncheon Intl
$793

momondo Fare Finder

 
Customize your flight search to find flights from Seoul to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 25, 2026.
Use the filters below to find and compare flights from Seoul to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 11/9

12:45 pm-12:01 pm

1 stop16h 16m

Ontario

Tue 11/17

6:00 am-4:15 pm

1 stop17h 15m

$789

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 8/19

11:30 am-12:12 pm

1 stop16h 42m

Ontario

Wed 8/26

5:00 am-4:20 am

2 stops31h 20m

$792

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 8/20

11:30 am-12:12 pm

1 stop16h 42m

Ontario

Sun 8/30

6:08 am-3:00 pm

1 stop16h 52m

$793

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 8/14

11:30 am-12:50 pm

2 stops41h 20m

Ontario

Tue 8/18

9:01 am-4:20 am

1 stop27h 19m

$796

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 11/5

12:45 pm-12:29 pm

1 stop16h 44m

Ontario

Sun 11/8

1:35 pm-5:40 am

1 stop23h 05m

$801

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sat 11/7

12:45 pm-12:01 pm

1 stop16h 16m

Ontario

Sun 11/15

1:52 pm-5:40 am

1 stop22h 48m

$822

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 8/19

11:30 am-6:16 pm

1 stop22h 46m

Ontario

Fri 8/21

5:00 am-4:20 am

2 stops31h 20m

$826

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 8/21

11:30 am-8:01 pm

1 stop24h 31m

Ontario

Fri 8/28

6:08 am-3:00 pm

1 stop16h 52m

$827

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 8/20

4:50 pm-8:01 pm

1 stop19h 11m

Ontario

Thu 8/27

7:13 pm-4:20 am

1 stop17h 07m

$849

SeoulOntario

GMP - ONT

GMPONT

Seoul Gimpo Intl

Sat 9/12

7:20 am-6:40 pm

2 stops27h 20m

Ontario

Fri 9/18

12:10 am-1:45 pm

2 stops21h 35m

$1,165

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

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

American Airlines is the most popular carrier operating from Seoul to Ontario

What airlines fly to Ontario?

AIR PREMIA, Asiana Airlines and United Airlines 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 58% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 7 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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

Fastest flight time

14h 32m

Direct flights

None
The fastest flight from Seoul to Ontario takes 14h 32m
There are no direct flights from Seoul to Ontario. There are no popular flight routes from Seoul to Ontario.
Search flight deals

Frequently asked questions about flying from Seoul to Ontario

  • 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 14h 32m.

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

    Prices for flights from Seoul to Ontario Airport refresh daily.

  • 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.

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.

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