Which airline has the best punctuality record on San Francisco to Ulsan flights?

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 6% of their flights experiencing any sort of delay.

What is the most punctual flight time for San Francisco to Ulsan flights?

Generally, flights departing at night tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

How often are flights from San Francisco to Ulsan delayed?

Historically, on average around 14% of flights between San Francisco and Ulsan have experienced a delay on any given week. The average delay length over the past 12 months has been 166 minutes.

When did momondo last update prices for flights from San Francisco Airport to Ulsan Airport?

Prices for flights from San Francisco Airport to Ulsan Airport are refreshed on a daily basis.

How old do you have to be to fly from San Francisco Airport to Ulsan Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Francisco Airport to Ulsan Airport.

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

The travel and health documents required for your trip to Ulsan Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ulsan Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$36 Cheap Flights from San Francisco to Ulsan in 2025/26

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12:40 pm - 8:20 amSFO-USN

27h 40m1 stop

8:15 pm - 10:40 amUSN-SFO

30h 25m1 stop

$1,627Korean Air

Find Deal

Thu, Apr 9 - Mon, Apr 27

12:40 pm - 8:20 amSFO-USN

27h 40m1 stop

8:15 pm - 1:57 pmUSN-SFO

57h 42m2 stops

$1,628Korean Air

Find Deal

Thu, Apr 9 - Tue, Apr 28

7:00 am - 8:20 amSFO-USN

33h 20m2 stops

8:15 pm - 10:40 amUSN-SFO

30h 25m1 stop

$1,632Korean Air

Find Deal

Mon, Mar 30 - Tue, Apr 21

4:03 pm - 7:35 pmSFO-USN

35h 32m2 stops

8:15 pm - 1:57 pmUSN-SFO

57h 42m2 stops

$1,633Korean Air

Find Deal

Thu, Apr 9 - Wed, Apr 29

7:00 am - 8:20 amSFO-USN

33h 20m2 stops

8:15 pm - 8:10 pmUSN-SFO

39h 55m2 stops

$1,643Korean Air

Find Deal

Mon, Mar 30 - Mon, Apr 20

1:05 pm - 8:20 amSFO-USN

51h 15m2 stops

8:15 pm - 10:40 amUSN-SFO

30h 25m1 stop

$1,645Korean Air

Find Deal

Sun, Apr 12 - Wed, Apr 29

4:03 pm - 8:20 amSFO-USN

48h 17m2 stops

8:15 pm - 1:57 pmUSN-SFO

57h 42m2 stops

$1,646Korean Air

Find Deal

Sun, Apr 12 - Tue, Apr 28

1:05 pm - 8:20 amSFO-USN

51h 15m2 stops

8:15 pm - 8:10 pmUSN-SFO

39h 55m2 stops

$1,650Korean Air

Find Deal

Sun, Apr 5 - Sun, Apr 19

12:40 pm - 8:20 amSFO-USN

27h 40m1 stop

9:00 am - 10:40 amUSN-SFO

17h 40m1 stop

$1,677Korean Air

Find Deal

Fri, Apr 10 - Mon, Apr 27

12:40 pm - 8:20 amSFO-USN

27h 40m1 stop

9:00 am - 1:57 pmUSN-SFO

44h 57m2 stops

$1,678Korean Air

Find Deal

Fri, Apr 10 - Wed, Apr 29

Korean Air flights from San Francisco to Ulsan

Our best Korean Air deals on San Francisco to Ulsan flight tickets

Korean Air

Apr 9

SFO12:40 pmSan Francisco

27h 40m

1 stop

USN8:20 amUlsan

Apr 27

USN8:15 pmUlsan

30h 25m

1 stop

SFO10:40 amSan Francisco

$1,627

Find similar

Korean Air

Apr 9

SFO12:40 pmSan Francisco

27h 40m

1 stop

USN8:20 amUlsan

Apr 29

USN9:00 amUlsan

44h 57m

2 stops

SFO1:57 pmSan Francisco

$1,628

Find similar

Korean Air

Mar 30

SFO7:00 amSan Francisco

33h 20m

2 stops

USN8:20 amUlsan

Apr 21

USN8:15 pmUlsan

30h 25m

1 stop

SFO10:40 amSan Francisco

$1,632

Find similar

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoUlsan

SFO - USN

SFOUSN

San Francisco

Thu 4/9

12:40 pm-8:20 am

1 stop27h 40m

Ulsan

Mon 4/27

8:15 pm-10:40 am

1 stop30h 25m

$1,627

San FranciscoUlsan

SFO - USN

SFOUSN

San Francisco

Thu 4/9

12:40 pm-8:20 am

1 stop27h 40m

Ulsan

Tue 4/28

8:15 pm-1:57 pm

2 stops57h 42m

$1,628

San FranciscoUlsan

SFO - USN

SFOUSN

San Francisco

Mon 3/30

7:00 am-8:20 am

2 stops33h 20m

Ulsan

Tue 4/21

8:15 pm-10:40 am

1 stop30h 25m

$1,632

San FranciscoUlsan

SFO - USN

SFOUSN

San Francisco

Thu 4/9

4:03 pm-7:35 pm

2 stops35h 32m

Ulsan

Wed 4/29

8:15 pm-1:57 pm

2 stops57h 42m

$1,633

San FranciscoUlsan

SFO - USN

SFOUSN

San Francisco

Mon 3/30

7:00 am-8:20 am

2 stops33h 20m

Ulsan

Mon 4/20

8:15 pm-8:10 pm

2 stops39h 55m

$1,643

San FranciscoUlsan

SFO - USN

SFOUSN

San Francisco

Sun 4/12

1:05 pm-8:20 am

2 stops51h 15m

Ulsan

Wed 4/29

8:15 pm-10:40 am

1 stop30h 25m

$1,645

San FranciscoUlsan

SFO - USN

SFOUSN

San Francisco

Sun 4/12

4:03 pm-8:20 am

2 stops48h 17m

Ulsan

Tue 4/28

8:15 pm-1:57 pm

2 stops57h 42m

$1,646

San FranciscoUlsan

SFO - USN

SFOUSN

San Francisco

Sun 4/5

1:05 pm-8:20 am

2 stops51h 15m

Ulsan

Sun 4/19

8:15 pm-8:10 pm

2 stops39h 55m

$1,650

San FranciscoUlsan

SFO - USN

SFOUSN

San Francisco

Fri 4/10

12:40 pm-8:20 am

1 stop27h 40m

Ulsan

Mon 4/27

9:00 am-10:40 am

1 stop17h 40m

$1,677

San FranciscoUlsan

SFO - USN

SFOUSN

San Francisco

Fri 4/10

12:40 pm-8:20 am

1 stop27h 40m

Ulsan

Wed 4/29

9:00 am-1:57 pm

2 stops44h 57m

$1,678

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How to get the cheapest flight ticket from San Francisco to Ulsan

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

Delays

What is the cheapest day to depart on your flight to Ulsan?

On average, the least expensive day to fly to Ulsan from San Francisco is on a Sunday. momondo users have found tickets for Sunday departures for as low as $148. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to Ulsan on Thursday is $479.

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

Flying to Ulsan from San Francisco at noon is the least expensive time of day to depart. momondo users have found prices as low as $190 when looking at flights departing at noon. In contrast, the most expensive time of day to depart to Ulsan is in the morning when prices are around $489.

When to book flights from San Francisco to Ulsan

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

Estimated round-trip price

Cheap San Francisco to Ulsan (SFO to USN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Ulsan

Fastest flight time	27h 40m
Direct flights	None

The fastest flight from San Francisco to Ulsan takes 27h 40m

There are no direct flights from San Francisco to Ulsan. There are no popular flight routes from San Francisco to Ulsan.

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How far is San Francisco to Ulsan by plane?
The straight-line distance from San Francisco to Ulsan is 5600.2 mi. In terms of flight time, this usually takes a little over 27h 40m.
When did momondo last update prices for flights from San Francisco Airport to Ulsan Airport?
Prices for flights from San Francisco Airport to Ulsan Airport are refreshed on a daily basis.
How old do you have to be to fly from San Francisco Airport to Ulsan Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Francisco Airport to Ulsan Airport.
What documentation or ID do you need to fly to Ulsan Airport?
The travel and health documents required for your trip to Ulsan Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ulsan Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Ulsan?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ulsan from San Francisco.

Can I find flights from San Francisco to Ulsan with flexible booking policies on momondo?

momondo does allow users to show only those flights to Ulsan from San Francisco which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from San Francisco to Ulsan?

momondo helps you find the best flight between San Francisco and Ulsan by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of San Francisco to Ulsan flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Cheap flights from San Francisco to Ulsan from $1,627

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Ulsan departing on 4/9. 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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How to get the cheapest flight ticket from San Francisco to Ulsan

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 day to depart on your flight to Ulsan?

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

Flying to Ulsan from San Francisco at noon is the least expensive time of day to depart. momondo users have found prices as low as $190 when looking at flights departing at noon. In contrast, the most expensive time of day to depart to Ulsan is in the morning when prices are around $489.

How often are flights from San Francisco to Ulsan delayed?

Historically, on average around 14% of flights between San Francisco and Ulsan have experienced a delay on any given week. The average delay length over the past 12 months has been 166 minutes.

What is the most punctual flight time for San Francisco to Ulsan flights?

Generally, flights departing at night tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on San Francisco to Ulsan flights?

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 6% of their flights experiencing any sort of delay.

When to book flights from San Francisco to Ulsan

Cheap San Francisco to Ulsan (SFO to USN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Ulsan

Fastest flight time

Direct flights

How far is San Francisco to Ulsan by plane?

When did momondo last update prices for flights from San Francisco Airport to Ulsan Airport?

How old do you have to be to fly from San Francisco Airport to Ulsan Airport?

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

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Ulsan?

Can I find flights from San Francisco to Ulsan with flexible booking policies on momondo?

How can momondo help me find flights from San Francisco to Ulsan?

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

An easier way to manage your Ulsan trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to South Korea

Airports servicing South Korea