Cheap Flights from San Francisco to Bangkok
San Francisco (SFO) → Bangkok (BKK) · 19–23 hours
Flights from San Francisco (SFO) to Bangkok (BKK) are operated by EVA Air, Japan Airlines, ANA, Korean Air and Cathay Pacific among others, with one stop at Taipei, Tokyo, Seoul or Hong Kong. Total journey time is typically 19–23 hours. You depart from San Francisco International (SFO) and arrive at Suvarnabhumi International (BKK).
| Departure airport | San Francisco International (SFO) |
|---|---|
| Arrival airport | Suvarnabhumi International (BKK) |
| Main airlines | EVA Air, Japan Airlines, ANA, Korean Air and Cathay Pacific |
| Routing | One stop at Taipei, Tokyo, Seoul or Hong Kong |
| Journey time | 19–23 hours |
| When to book | Three to five months ahead, and further for the November–February high season and the Lunar New Year period |
Flying out of San Francisco SFO
San Francisco is the most direct US gateway to South and East Asia, and the Bay Area's concentration of Indian technology professionals has made SFO–India one of the most heavily served long-haul corridors in the country. That density cuts both ways: there is real nonstop capacity, but demand around the winter holidays and the summer university calendar is severe enough that fares from Fremont, Sunnyvale and San Jose can double if you leave the booking to the last month. Early planning is worth more on this corridor than almost any other we handle.
What to know before you fly to Bangkok
Entry requirements for US travellers
US passport holders can enter Thailand without a visa for tourism for a limited stay. The permitted length has changed more than once in recent years, so confirm the current allowance with the Royal Thai Embassy before booking a long trip — overstaying carries real penalties.
Best time to go
November to February is the cool, dry high season with the best weather and the highest fares. March to May is very hot. The green season from June to October brings the lowest prices from the US and rain that is usually heavy rather than constant.
Airports and arrival
Suvarnabhumi (BKK) handles international arrivals and is the connecting point for Phuket, Chiang Mai and the rest of Southeast Asia. Don Mueang (DMK) is the low-cost airport — if your onward flight leaves from there, budget properly for the transfer.
Baggage
Every US–Thailand itinerary connects at least once, typically in East Asia or the Gulf. Allowances on the two legs are frequently different, and the domestic Thai leg to the islands is usually the tightest of the three.
Airlines from San Francisco to Bangkok
Itineraries offer one stop at Taipei, Tokyo, Seoul or Hong Kong.
Getting the best price to Bangkok
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San Francisco to Bangkok — frequently asked questions
Fares on the San Francisco–Bangkok route vary widely by season and how far ahead you book. We do not publish an estimate we have not measured for this pair; call our agents and they will quote the live consolidator fare for your dates.
Carriers on this route include EVA Air, Japan Airlines, ANA, Korean Air and Cathay Pacific. Others serve it on one-stop itineraries, and the cheapest is not always a name you would expect — the lowest fare we have tracked here was on a carrier outside that list more than once. Itineraries offer one stop at Taipei, Tokyo, Seoul or Hong Kong, and total journey time runs about 19–23 hours. Which carrier is cheapest changes with the season and the fare bucket rather than staying fixed, which is why we compare them all on every quote.
Plan on 19–23 hours from San Francisco International (SFO) to Suvarnabhumi International (BKK), including time on the ground if your itinerary connects.
Book three to five months ahead, and further for the November–February high season and the Lunar New Year period.
No — every itinerary from San Francisco to Bangkok connects at least once, with one stop at Taipei, Tokyo, Seoul or Hong Kong. Which connection is best is not just about total time: the length of the layover, whether you change terminals, and whether both legs are on one ticket all matter more than the headline duration. We compare them rather than sorting by price alone.
SFO handles the Bay Area's international departures, with Oakland (OAK) and San Jose (SJC) serving domestic and short-haul routes. From the South Bay, SJC is sometimes the better start to a connecting itinerary despite SFO's bigger schedule — the drive up the peninsula at the wrong hour can cost more time than the connection saves.
Every US itinerary here connects at least once, which means the cheapest headline fare and the best trip are often different bookings. Agents can also hold and combine fares across carriers — an open-jaw into one city and out of another — which most consumer booking sites either cannot price or price badly. SkyKaro's agents are reachable 24/7, and nothing is charged until an agent has confirmed the itinerary and the price with you.