Cheap flights from San Francisco to Seoul from $310 SFO → GMP, ICN

Found recently, and the cheapest we hold

It is also the cheapest return we hold, of any age.

What have prices looked like?

Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $620 to $794.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other 6-night return fares leaving within 3 days of 20 Feb 2027 to compare.

Every date we hold

32 fares on 13 departure dates

Which month looks cheapest?

February 2027 is the cheapest month — from $638.

Found recently, and the cheapest we hold

It is also the cheapest one-way we hold, of any age.

What have prices looked like?

Over 44 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $310 to $373.

At $310, the cheapest one-way found recently is at the low end of that range.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other one-way fares leaving within 3 days of 30 Mar 2027 to compare.

Every date we hold

38 fares on 16 departure dates

Which month looks cheapest?

March 2027 is the cheapest month — from $310.

Return

Fares 30 to 59 days before departure were typically 16% lower than 0 to 6 days before departure.

From the cheapest return each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

One-way

Fares 60 to 89 days before departure were typically 8% lower than 30 to 59 days before departure.

From the cheapest one-way each day between 24 Sept and 11 Nov (44 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

How much is a return flight from San Francisco to Seoul?

The cheapest return found recently is $638 with Air Premia, 20 Feb 2027 to 26 Feb 2027, found 3 days ago. The cheapest return fare on each of 13 departure dates is usually $645 to $828.

How much is a one-way flight from San Francisco to Seoul?

The cheapest one-way found recently is $310 with Philippine Airlines, 30 Mar 2027, found 2 days ago. The cheapest one-way fare on each of 16 departure dates is usually $322 to $390.

What is the cheapest month to fly from San Francisco to Seoul?

February 2027 is the cheapest month for a return, from $638, 20 Feb 2027 to 26 Feb 2027, found 3 days ago. March 2027 is the cheapest month for a one-way, from $310, 30 Mar 2027, found 2 days ago.

How far ahead should I book a flight from San Francisco to Seoul?

In 49 days of prices between 24 Sept and 11 Nov, return fares 30 to 59 days before departure were typically 16% lower than 0 to 6 days before departure. In 44 days of prices between 24 Sept and 11 Nov, one-way fares 60 to 89 days before departure were typically 8% lower than 30 to 59 days before departure.

Is there a direct flight from San Francisco to Seoul?

Yes, the cheapest nonstop return found recently is $638 with Air Premia, 20 Feb 2027 to 26 Feb 2027, found 3 days ago. The cheapest nonstop one-way found recently is $345 with United Airlines, 30 Mar 2027, found 2 days ago.

How long is the flight from San Francisco to Seoul?

The cheapest nonstop one-way found recently, with United Airlines on 30 Mar 2027, takes 12 h 40 min from San Francisco International Airport (SFO) to Incheon International Airport (ICN). The cheapest one-way found recently, with Philippine Airlines on 30 Mar 2027, takes 26 h 45 min with 1 stop, including a 9 h connection.

Which airlines have the cheapest flights from San Francisco to Seoul?

Between 15 Nov and 26 Apr 2027, Air Premia has the cheapest return on 9 of the 13 departure dates we hold, Air Canada on 2 and Philippine Airlines on 1. Between 11 Jan 2027 and 22 Apr 2027, Air Premia has the cheapest one-way on 8 of the 16 departure dates we hold, Philippine Airlines on 4 and United Airlines on 3.