Cheap flights from San Francisco to Southeast Asia

SFO — BKK
2 Dec — 9 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from San Francisco to Southeast Asia

Popular in

December

Cheapest in

February

Average price

£633
Highest demand for flights based on searches. 7% potential increase in price (£43 potential increase over avg. return price).
Cheapest flight prices on average. 5% potential price decrease (£27 potential savings vs. average return price).
Average for round-trip flights in November 2026

Cheapflights Insights

Everything you need to know about your flight from San Francisco to Southeast Asia

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

Booking 53 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to Southeast Asia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from San Francisco to Southeast Asia?

Currently, April is the cheapest month in which you can book a flight from San Francisco to Southeast Asia (average of £602). Flying from San Francisco to Southeast Asia in December is currently the most expensive (average of £1,039). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SFO to YJX?

When flying from San Francisco to Southeast Asia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Southeast Asia

Check out reviews from past customers who have flown with Cathay Pacific and Philippine Airlines from San Francisco to Southeast Asia to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Comfort

7.6

Entertainment

7.8

Overall

7.6

Crew

8.1

Boarding

7.9

Food

7.3

Reviews

1 / 20
4.0
Okay

Paden,Oct 2026

SEA - HKG

Ground staff at Seattle counter were excellent . Business class on board experience was very disappointing. There was no pajamas, no bed turn down service and the service was very mediocre took long time to get one extra roll of bread. Not very forthcoming quite curt in general. Also was situated in the middle row first row whole night being right next to the toilet not able to get any sleep. The entertainment wad very outdated too! Sorry to complain but I had high hopes for Cathay as I have flow years ago and the experience then was like night and day. Usually fly Qatar or Emirates the service doesn't compare. My flight from HKG to Delhi was much better. Thanks

Comfort

7.6

Entertainment

7.8

Overall

7.6

Crew

8.1

Boarding

7.9

Food

7.3

Reviews

1 / 20
4.0
Okay

Paden,Oct 2026

SEA - HKG

Ground staff at Seattle counter were excellent . Business class on board experience was very disappointing. There was no pajamas, no bed turn down service and the service was very mediocre took long time to get one extra roll of bread. Not very forthcoming quite curt in general. Also was situated in the middle row first row whole night being right next to the toilet not able to get any sleep. The entertainment wad very outdated too! Sorry to complain but I had high hopes for Cathay as I have flow years ago and the experience then was like night and day. Usually fly Qatar or Emirates the service doesn't compare. My flight from HKG to Delhi was much better. Thanks

Comfort

7.6

Entertainment

7.8

Overall

7.6

Crew

8.1

Boarding

7.9

Food

7.3

Reviews

1 / 20
4.0
Okay

Paden,Oct 2026

SEA - HKG

Ground staff at Seattle counter were excellent . Business class on board experience was very disappointing. There was no pajamas, no bed turn down service and the service was very mediocre took long time to get one extra roll of bread. Not very forthcoming quite curt in general. Also was situated in the middle row first row whole night being right next to the toilet not able to get any sleep. The entertainment wad very outdated too! Sorry to complain but I had high hopes for Cathay as I have flow years ago and the experience then was like night and day. Usually fly Qatar or Emirates the service doesn't compare. My flight from HKG to Delhi was much better. Thanks

Related info for your journey

  • What airport do you fly from for flights from San Francisco to Southeast Asia?

    If you book a flight to Southeast Asia from San Francisco, you will be flying from San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.0 mi from the center of San Francisco.

  • What are the most popular routes from San Francisco to Southeast Asia?

  • Can I find deals for flights from San Francisco to Southeast Asia that include hotel bookings?

    Yes. In addition to deals on San Francisco to Southeast Asia flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Southeast Asia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Southeast Asia.

  • Can I find deals for business class flights from San Francisco to Southeast Asia?

    Yes. Cheapflights offers flight deals from San Francisco to Southeast Asia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Francisco to Southeast Asia?

    Currently, April is the cheapest month in which you can book a flight from San Francisco to Southeast Asia (average of £602). Flying from San Francisco to Southeast Asia in December is currently the most expensive (average of £1,039). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from San Francisco to Southeast Asia

AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest£290Average£728FlexibilityNo cancel feeOn-time60%
Search Philippine Airlines flights
Cathay PacificCheapest£486Average£969FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights

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Deals for San Francisco to Southeast Asia flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from San Francisco to Southeast Asia.

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Need flexible booking options for your flight to Southeast Asia from San Francisco? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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