Flights Bangkok to San Francisco (BKK-SFO): Airlines, THB Fares

Bangkok to San Francisco connects Thailand with the San Francisco Bay Area, home to a substantial and well-established Thai community. The route carries people visiting family, students and academics, technology-sector professionals, and travellers using San Francisco as their entry point to Northern California and the wider US West.

There is no nonstop service; block times near 17.8 hours reflect a single connection through the operating carrier’s Asian hub. With around 10 flights a week, the corridor is dependable, and demand peaks around the long school holidays and the year-end.

Corridor profile

Airlines & baggage

Airlines on this route

Four carriers serve BKK-SFO, all full-service and all routing through a hub: EVA Air via Taipei, Cathay Pacific via Hong Kong, Korean Air via Seoul and Thai Airways. On a journey approaching eighteen hours, the connecting airport, the layover length and the checked baggage allowance matter as much as the headline fare. Comparing two or three carriers on the same dates is usually worth the effort, as schedules and prices differ between the hubs.

Monthly market-low pattern (THB)

Fare trends

BKK-SFO is a long, premium-leaning route where booking ahead pays. The year-end holidays and the mid-year break are the busiest and dearest — eight to fourteen weeks of lead time is sensible for those windows. Outside the peaks, a six-to-ten-week window often finds a workable economy fare in THB, with the hub carriers competing on connecting itineraries. Flexible dates and an open mind on the transit hub both help.

Seasonality & best time to book

Bangkok–San Francisco fares move with demand. The cheapest windows fall outside school holidays, Songkran and New Year; book 4–8 weeks ahead for normal dates. As a migrant-worker corridor, demand rises around contract turnover and long holidays — book early.

About San Francisco

San Francisco is the urban heart of a wider Bay Area that includes Oakland, San Jose and Silicon Valley — a region with deep Thai community roots and a strong draw for students and professionals. The city itself is compact and walkable, set on hills above the bay, with a famous fog, distinct neighbourhoods and a long food culture. For Thai travellers, San Francisco works as a family destination, a study or work base, and a gateway to Northern California.

FAQ

Which airlines fly Bangkok to San Francisco?

The BKK-SFO route is operated by EVA Air, Cathay Pacific, Korean Air and Thai Airways. Compare baggage, alliances and fares in the table above.

How long and how often is the BKK-SFO flight?

Block time is ~17.8h, with ~10 flights per week across all carriers.

When is BKK-SFO cheapest to book?

The cheapest fare in our cache is ~฿15,639. Book 4–8 weeks ahead; avoid Songkran, school holidays and peak season to save 15–30%.

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Related

• BKK airport
• SFO airport