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

Flights Bangkok → San Francisco (BKK-SFO) — THB Fares, Airlines, Frequency

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.

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.

THB fares

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.

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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? Direct BKK-SFO flights are operated by EVA Air, Cathay Pacific, Korean Air, Thai Airways. Compare baggage allowance, fares and schedules in the carrier table above.

How long is the BKK-SFO flight and how often does it run? Block time is about 17.8 hours. The BKK-SFO route runs roughly 10 flights per week across all carriers.

How far ahead should I book BKK-SFO for the best fare? Booking 4-8 weeks ahead for regular dates, and 10-14 weeks for peak periods (Songkran, New Year, Hajj/Umrah season), typically saves 15-30%. See the month-by-month fare heatmap above.

What is the checked baggage allowance on BKK-SFO? It varies by carrier and fare class — full-service carriers on this route usually include 20-30 kg, while low-cost carriers sell it as an add-on. Confirm the current policy on the airline’s site before booking. Migrant workers should check each carrier’s extra-baggage uplift.

What currency is used in San Francisco? San Francisco uses USD. Compare airfares in THB and budget on-the-ground spending in USD.

Related routes

• BKK airport
• SFO airport