$336 Cheap Flights from Seoul (ICN) to San Francisco (SFO)

View $336 flight on Mon, Oct 13, 2025Opens in a new window

Popular airlines from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO)

Cheap Flights from Seoul to San Francisco (ICN-SFO)

Prices were available within the past 7 days and start at $336 for one-way flights and $412 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, Sep 10 - Sat, Sep 13
ICN
Seoul
SFO
San Francisco
$412 Roundtrip, found 20 hours ago
$412
Roundtrip
found 20 hours ago
Select Air Canada flight, departing Wed, Sep 10 from Seoul to San Francisco, returning Sat, Sep 13, priced at $412 found 20 hours ago
Hawaiian Airlines
Wed, Oct 29 - Thu, Oct 30
ICN
Seoul
SFO
San Francisco
$416 Roundtrip, found 6 days ago
$416
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Wed, Oct 29 from Seoul to San Francisco, returning Thu, Oct 30, priced at $416 found 6 days ago
Alaska Airlines
Wed, Oct 29 - Thu, Oct 30
ICN
Seoul
SFO
San Francisco
$416 Roundtrip, found 6 days ago
$416
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Oct 29 from Seoul to San Francisco, returning Thu, Oct 30, priced at $416 found 6 days ago
United
Sun, Sep 21 - Fri, Sep 26
ICN
Seoul
SFO
San Francisco
$423 Roundtrip, found 21 hours ago
$423
Roundtrip
found 21 hours ago
Select United flight, departing Sun, Sep 21 from Seoul to San Francisco, returning Fri, Sep 26, priced at $423 found 21 hours ago
American Airlines
Tue, Sep 16 - Mon, Sep 22
ICN
Seoul
SFO
San Francisco
$476 Roundtrip, found 4 days ago
$476
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Sep 16 from Seoul to San Francisco, returning Mon, Sep 22, priced at $476 found 4 days ago
Air Premia
Fri, Dec 26 - Fri, Jan 2
ICN
Seoul
SFO
San Francisco
$512 Roundtrip, found 20 hours ago
$512
Roundtrip
found 20 hours ago
Select Air Premia flight, departing Fri, Dec 26 from Seoul to San Francisco, returning Fri, Jan 2, priced at $512 found 20 hours ago
Asiana Airlines
Sun, Oct 19 - Thu, Oct 23
ICN
Seoul
SFO
San Francisco
$607 Roundtrip, found 20 hours ago
$607
Roundtrip
found 20 hours ago
Select Asiana Airlines flight, departing Sun, Oct 19 from Seoul to San Francisco, returning Thu, Oct 23, priced at $607 found 20 hours ago
Korean Air
Tue, Sep 23 - Mon, Sep 29
ICN
Seoul
SFO
San Francisco
$628 Roundtrip, found 20 hours ago
$628
Roundtrip
found 20 hours ago
Select Korean Air flight, departing Tue, Sep 23 from Seoul to San Francisco, returning Mon, Sep 29, priced at $628 found 20 hours ago
Delta
Tue, Sep 23 - Mon, Sep 29
ICN
Seoul
SFO
San Francisco
$628 Roundtrip, found 20 hours ago
$628
Roundtrip
found 20 hours ago
Select Delta flight, departing Tue, Sep 23 from Seoul to San Francisco, returning Mon, Sep 29, priced at $628 found 20 hours ago
Philippine Airlines
Wed, Sep 10 - Sat, Sep 13
ICN
Seoul
SFO
San Francisco
$802 Roundtrip, found 20 hours ago
$802
Roundtrip
found 20 hours ago
Select Philippine Airlines flight, departing Wed, Sep 10 from Seoul to San Francisco, returning Sat, Sep 13, priced at $802 found 20 hours ago

Find the cheapest month to fly from Seoul (ICN) to San Francisco (SFO)

November is typically the cheapest month to fly

From $413 - $605 per traveler.

Graph displaying average flight prices per month

Alternative airports near San Francisco

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Oakland Intl. OAK. Average driving time to city center is 26 minutes. Flights from $813
OAK
Oakland Intl.
Average driving time to city center26 min
Flights from $813
Flights from Seoul (ICN) to San Francisco (SFO)
Origin airport
Incheon Intl.
Destination airport
San Francisco Intl.
Airlines serving
Air Canada, Air China, Air Premia, Alaska Airlines, All Nippon Airways, American Airlines, Asiana Airlines, Cathay Pacific, China Airlines, China Southern Airlines, Delta, EVA Airways, Hawaiian Airlines, Japan Airlines, Korean Air, Philippine Airlines, Singapore Airlines, United, Vietnam Airlines, WestJet
Roundtrip price
$412
Distance
5645 mi
Average flight time
-5 hours -20 mins

Seoul to San Francisco Flights

The cheapest times to fly from Seoul to San Francisco

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seoul to San Francisco are during the month of September. You can find some of the cheapest flights from Seoul to San Francisco with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seoul to San Francisco

Sunday is one of the best days to book for cheap flights from Seoul to San Francisco: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seoul to San Francisco

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seoul to San Francisco in 2025. You can also book with separate airlines for your outbound and return journeys, from $336 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seoul to San Francisco flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seoul to San Francisco airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO) cost?
Lock in a cheap one-way flight from $336 or cheap return flight from $412 from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO)?
Planning your getaway for September can help you save, as it's the cheapest month for flights between ICN and SFO. You'll usually find the lowest prices during the off-season.
Which airlines fly direct from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO)?
Avoid the layovers and fly straight from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO) with 4 carriers, including:

  • United Airlines
  • Asiana Airlines
  • Korean Air

What is the cheapest airline that flies from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO)?
Air Premia and Korean Air are some popular carriers offering reasonable fares. Don't forget that flight prices from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO) can change based on travel dates, demand and how early you book. With Expedia's filter tool, you can easily find an ICN to SFO flight that works with your plans and budget.
How many flights per day from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO)?
Each day on average, 5 direct flights take off from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO). Choose the departure date that best suits your plans.
What are the most popular departure times for flights from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO)?
More travelers fly between ICN and SFO at 12 PM than at any other time of day. Rather go when it's quieter? Pick a flight outside the busiest times and there's a chance you'll save on your fare as well.
What day of the week has the most flights from ICN to SFO?
Fly on a Friday if you're looking for the biggest selection of flights from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO).
What is the earliest flight from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO)?
Catch the earliest flight at around 12:45PM UTC+9, leaving from Incheon Intl. Airport (ICN). You'll be traveling for around 10h 35m, reaching San Francisco Intl. Airport (SFO) at approximately 6:20AM UTC-8.
How long does it take to fly from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO)?
Typically, it takes 10 hours and 25 minutes to cover the 5,700 mi from ICN to SFO.
What airline has the least delays from ICN to SFO?
United Airlines has the strongest track record for on-time direct flights from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO), with an on-time rating of 80%. Use the Expedia App to check your flight status before you take off and get notified of any trip changes.
What is the best time to fly from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO)?
To arrive at San Francisco Intl. Airport (SFO) on schedule, choose a flight that takes off from Incheon Intl. Airport (ICN) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for San Francisco from Incheon Intl. Airport (ICN)?
If you're on a direct flight from Incheon Intl. Airport (ICN) to San Francisco, San Francisco Intl. Airport (SFO) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO) last-minute?
Last-minute bookings from ICN to SFO are usually more expensive. To lock in the cheapest rates, start looking for flights as soon as possible. That being said, if you can play around with your travel dates, you may score a cheap fare right before you leave.
Is it cheaper to book an ICN to SFO flight and hotel package?
Booking an ICN to SFO flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Choose from our wide range of stays and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Incheon Intl. Airport (ICN) to San Francisco Intl. Airport (SFO)?
Usually, it's possible to cancel or reschedule your ICN to SFO flight. However, if it's been more than 24 hours since booking, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.