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Cheap flights from Seoul to Los Angeles from $406

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 5/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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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
11:30 am - 12:22 pm
ICN
-
ONT
16h 52m
1 stop
United Airlines Logo
5:00 am - 4:20 am
ONT
-
ICN
31h 20m
2 stops
$491United Airlines
Mon, May 18 - Tue, Jul 21
Asiana Airlines Logo
11:30 am - 9:41 am
ICN
-
ONT
14h 11m
1 stop
Asiana Airlines Logo
6:53 pm - 5:40 am
ONT
-
ICN
17h 47m
1 stop
$578Asiana Airlines
Tue, May 5 - Tue, Nov 3
Alaska Airlines Logo
7:35 pm - 10:32 pm
ICN
-
ONT
18h 57m
1 stop
Alaska Airlines Logo
6:00 am - 5:30 pm
ONT
-
ICN
19h 30m
1 stop
$587Alaska Airlines
Sat, May 2 - Mon, May 4
Alaska Airlines Logo
7:35 pm - 7:03 pm
ICN
-
ONT
15h 28m
1 stop
Alaska Airlines Logo
6:00 am - 5:35 pm
ONT
-
ICN
18h 35m
1 stop
$634Alaska Airlines
Wed, Sep 23 - Wed, Nov 25
Alaska Airlines Logo
7:35 pm - 11:59 pm
ICN
-
ONT
20h 24m
1 stop
Alaska Airlines Logo
3:09 pm - 5:30 pm
ONT
-
ICN
34h 21m
1 stop
$643Alaska Airlines
Sun, May 10 - Tue, Sep 8
Alaska Airlines Logo
7:35 pm - 7:03 pm
ICN
-
ONT
15h 28m
1 stop
Alaska Airlines Logo
7:32 pm - 5:35 pm
ONT
-
ICN
29h 03m
1 stop
$651Alaska Airlines
Wed, Sep 23 - Tue, Nov 24
United Airlines Logo
4:50 pm - 6:11 pm
ICN
-
ONT
17h 21m
1 stop
United Airlines Logo
8:00 am - 3:00 pm
ONT
-
ICN
15h 00m
1 stop
$657United Airlines
Wed, Sep 9 - Wed, Sep 16
United Airlines Logo
4:50 pm - 12:12 pm
ICN
-
ONT
35h 22m
1 stop
United Airlines Logo
1:44 pm - 3:00 pm
ONT
-
ICN
33h 16m
1 stop
$670United Airlines
Mon, Sep 14 - Mon, Sep 21
Japan Airlines Logo
8:00 am - 3:09 pm
GMP
-
ONT
23h 09m
2 stops
Japan Airlines Logo
6:02 am - 10:40 am
ONT
-
GMP
36h 38m
2 stops
$1,502Japan Airlines
Mon, Jun 8 - Wed, Jun 10
Multiple Airlines Logo
1:50 pm - 11:11 am
GMP
-
ONT
37h 21m
2 stops
Multiple Airlines Logo
5:54 pm - 12:50 pm
ONT
-
GMP
26h 56m
2 stops
$2,236Multiple Airlines
Sat, Jul 11 - Wed, Jul 29

United Airlines flights from Seoul to Ontario

Our best United Airlines deals on Seoul to Ontario flight tickets
United Airlines
May 18
ICN11:30 amIncheon Intl
14h 11m
1 stop
ONT9:41 amOntario
Jul 21
ONT6:00 amOntario
17h 00m
1 stop
ICN3:00 pmIncheon Intl
$491
United Airlines
Sep 9
ICN4:50 pmIncheon Intl
17h 21m
1 stop
ONT6:11 pmOntario
Sep 16
ONT8:00 amOntario
15h 00m
1 stop
ICN3:00 pmIncheon Intl
$657
United Airlines
Sep 14
ICN4:50 pmIncheon Intl
35h 22m
1 stop
ONT12:12 pmOntario
Sep 21
ONT1:44 pmOntario
33h 16m
1 stop
ICN3:00 pmIncheon Intl
$670

Asiana Airlines flights from Seoul to Ontario

Our best Asiana Airlines deals on Seoul to Ontario flight tickets
Asiana Airlines
May 5
ICN11:30 amIncheon Intl
14h 11m
1 stop
ONT9:41 amOntario
Nov 3
ONT6:53 pmOntario
17h 47m
1 stop
ICN5:40 amIncheon Intl
$578
Asiana Airlines
Apr 15
ICN4:50 pmIncheon Intl
16h 57m
1 stop
ONT5:47 pmOntario
Apr 29
ONT6:49 pmOntario
17h 31m
1 stop
ICN4:20 amIncheon Intl
$1,337
Asiana Airlines
Apr 5
ICN4:50 pmIncheon Intl
16h 57m
1 stop
ONT5:47 pmOntario
Apr 13
ONT6:00 amOntario
17h 00m
1 stop
ICN3:00 pmIncheon Intl
$1,395

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 April 4, 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

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 5/18

11:30 am-12:22 pm

1 stop16h 52m

Ontario

Tue 7/21

5:00 am-4:20 am

2 stops31h 20m

$491
Quickest round-trip

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Tue 5/5

11:30 am-9:41 am

1 stop14h 11m

Ontario

Tue 11/3

6:53 pm-5:40 am

1 stop17h 47m

$578

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sat 5/2

7:35 pm-10:32 pm

1 stop18h 57m

Ontario

Mon 5/4

6:00 am-5:30 pm

1 stop19h 30m

$587

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 9/23

7:35 pm-7:03 pm

1 stop15h 28m

Ontario

Wed 11/25

6:00 am-5:35 pm

1 stop18h 35m

$634

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sun 5/10

7:35 pm-11:59 pm

1 stop20h 24m

Ontario

Tue 9/8

3:09 pm-5:30 pm

1 stop34h 21m

$643

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 9/23

7:35 pm-7:03 pm

1 stop15h 28m

Ontario

Tue 11/24

7:32 pm-5:35 pm

1 stop29h 03m

$651

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 9/9

4:50 pm-6:11 pm

1 stop17h 21m

Ontario

Wed 9/16

8:00 am-3:00 pm

1 stop15h 00m

$657

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 9/14

4:50 pm-12:12 pm

1 stop35h 22m

Ontario

Mon 9/21

1:44 pm-3:00 pm

1 stop33h 16m

$670

SeoulOntario

GMP - ONT

GMPONT

Seoul Gimpo Intl

Mon 6/8

8:00 am-3:09 pm

2 stops23h 09m

Ontario

Wed 6/10

6:02 am-10:40 am

2 stops36h 38m

$1,502

SeoulOntario

GMP - ONT

GMPONT

Seoul Gimpo Intl

Sat 7/11

1:50 pm-11:11 am

2 stops37h 21m

Ontario

Wed 7/29

5:54 pm-12:50 pm

2 stops26h 56m

$2,236

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Los Angeles from

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?

United Airlines, Alaska Airlines, and China Airlines are the most popular carriers 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 53% 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.

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 26m

Direct flights

None
The fastest flight from Seoul to Ontario takes 14h 26m
There are no direct flights from Seoul to Ontario. There are no popular flight routes from Seoul to Ontario.
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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 26m.

  • 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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