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San Francisco to Bangkok SFO → BKK, DMK

San Francisco International Airport (SFO) → Suvarnabhumi Airport (BKK), Don Mueang International Airport (DMK)

The cheapest return found recently is $1,822 with Frontier Airlines, 20 Dec – 7 Jan 2027, found 3 days ago. The cheapest one-way found recently is $293 with Air Premia, 28 Nov, found today.

Return

Not enough comparable prices yet for a usual return price.

Cheapest return found recently

$1,822

20 Dec – 7 Jan 2027 · Frontier Airlines

San Francisco International Airport (SFO) → Don Mueang International Airport (DMK)

Leaves 10:21 p.m. · Return leaves 9:30 p.m. · 107 h 14 min of travel, both ways together

out 3 stops, back 2 stops

found 3 days ago

See prices for these datesCheck today's price

Cheapest nonstop return

None seen yet.

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Found recently, and the cheapest we hold

Cheapest found recently $1,822 20 Dec – 7 Jan 2027found 3 days agoSee prices for these dates

Cheapest we hold, of any age $817 10 Jan 2027 – 3 Feb 2027found 4 days agoSee prices for these dates

What have prices looked like?

Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $428 to $862.

At $1,822, the cheapest return found recently is above that range.

25 days is a short history, so treat this range as an early guide.

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

Is this a good return price?

Not enough comparable prices yet: we hold return fares on 2 departure dates and need at least 3 to say what is usual.

Could nearby dates be cheaper?

We hold no other 18-night return fares leaving within 3 days of 20 Dec to compare.

Every date we hold

2 fares on 2 departure dates

20 Dec – 7 Jan 2027: $1,822, found 3 days ago10 Jan 2027 – 3 Feb 2027: $817, found 4 days agoDecJan
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
20 Dec – 7 Jan 2027$1,822Frontier AirlinesSan Francisco International Airport (SFO) → Don Mueang International Airport (DMK)out 3 stops, back 2 stopsfound 3 days agoSee prices for these dates
10 Jan 2027 – 3 Feb 2027$817Asiana AirlinesSan Francisco International Airport (SFO) → Suvarnabhumi Airport (BKK)out 1 stop, back 1 stopfound 4 days agoSee prices for these dates

Which month looks cheapest?

January 2027 is the cheapest month — from $817.

December 2026From $1,8221 departure date20 Dec – 7 Jan 2027 · found 3 days agoSee prices for these dates
January 2027From $817Cheapest seen1 departure date10 Jan 2027 – 3 Feb 2027 · found 4 days agoSee prices for these dates

Airlines on the cheapest dates: Frontier Airlines, Asiana Airlines.

One-way

The cheapest one-way fare on each of 7 departure dates is usually $303 to $400.

Cheapest one-way found recently

$293

28 Nov · Air Premia

San Francisco International Airport (SFO) → Suvarnabhumi Airport (BKK)

Leaves 3:20 p.m. · 39 h 5 min trip

1 stop

found today

Open this tripCheck today's price

Cheapest nonstop one-way

None seen yet.

FareTell may earn a commission when you book through a partner.

Found recently, and the cheapest we hold

Cheapest found recently $293 28 Novfound todayOpen this trip

Cheapest we hold, of any age $236 27 Octfound 2 days agoOpen this trip

What have prices looked like?

Over 22 days, 25 Sept to 18 Oct, the cheapest one-way we saw each day was $236 to $868.

$293, the cheapest one-way found recently, sits here in that range of $236 to $868.

22 days is a short history, so treat this range as an early guide.

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

Is this a good one-way price?

Compared with the cheapest one-way fare on each of 7 departure dates from 27 Oct to 9 Feb 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.

Could nearby dates be cheaper?

We hold no other one-way fares leaving within 3 days of 28 Nov to compare.

Every date we hold

7 fares on 7 departure dates

27 Oct: $236, found 2 days ago28 Nov: $293, found today17 Jan 2027: $312, found yesterday26 Jan 2027: $399, found 2 days ago2 Feb 2027: $400, found 2 days ago5 Feb 2027: $423, found 2 days ago9 Feb 2027: $363, found 2 days agoOctNovJanFeb
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
27 Oct$236United AirlinesSan Francisco International Airport (SFO) → Suvarnabhumi Airport (BKK)stops unknownfound 2 days agoOpen this trip
28 Nov$293Air PremiaSan Francisco International Airport (SFO) → Suvarnabhumi Airport (BKK)1 stopfound todayOpen this trip
17 Jan 2027$312Air PremiaSan Francisco International Airport (SFO) → Suvarnabhumi Airport (BKK)1 stopfound yesterdayOpen this trip
26 Jan 2027$399Singapore AirlinesSan Francisco International Airport (SFO) → Suvarnabhumi Airport (BKK)1 stopfound 2 days agoOpen this trip
2 Feb 2027$400Singapore AirlinesSan Francisco International Airport (SFO) → Suvarnabhumi Airport (BKK)1 stopfound 2 days agoOpen this trip
5 Feb 2027$423Singapore AirlinesSan Francisco International Airport (SFO) → Suvarnabhumi Airport (BKK)1 stopfound 2 days agoOpen this trip
9 Feb 2027$363China Southern AirlinesSan Francisco International Airport (SFO) → Suvarnabhumi Airport (BKK)1 stopfound 2 days agoOpen this trip

Which month looks cheapest?

October 2026 is the cheapest month — from $236.

October 2026From $236Cheapest seen1 departure date27 Oct · found 2 days agoOpen this trip
November 2026From $2931 departure date28 Nov · found todayOpen this trip
January 2027From $3122 departure dates17 Jan 2027 · found yesterdayOpen this trip
February 2027From $3633 departure dates9 Feb 2027 · found 2 days agoOpen this trip

Airlines on the cheapest dates: Singapore Airlines, Air Premia, United Airlines, China Southern Airlines.

Premium cabin fares from San Francisco to Bangkok

We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.

Today's prices for 20 Dec – 7 Jan 2027 in another cabin: Premium economy · Business · First

Today's prices for 28 Nov in another cabin: Premium economy · Business · First

How far ahead were prices cheapest for San Francisco to Bangkok?

Return

Fares 90 to 179 days before departure were typically 12% lower than 14 to 29 days before departure.

From the cheapest return each day between 24 Sept and 18 Oct (25 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.

See these ranges as a table
Typical price in each booking range — round trip, per traveler in Economy.
Booked ahead byTypical fareCheapest dayAbove the cheapestDays of prices
14–29 days$824$774+14%21
30–59 days$834$751+16%21
60–89 days$895$795+24%25
90–179 days$722$428Cheapest seen18

One-way

Not enough history yet: in 22 days of one-way prices, 25 Sept to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.

Could a nearby airport be cheaper?

A different airport at either end can change the fare — sometimes a lot.

Return

San Jose → Bangkok

67 km from San Francisco

$2,327

$505 more than flying from San Francisco

20 Dec – 7 Jan 2027 · SJC → BKK · out 2 stops, back 2 stops

found 3 days ago

See this route

Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.

One-way

San Jose → Bangkok

67 km from San Francisco

$474

$181 more than flying from San Francisco

17 Jan 2027 · SJC → BKK · 2 stops

found yesterday

See this route

Oakland → Bangkok

13 km from San Francisco

$614

$321 more than flying from San Francisco

2 Feb 2027 · OAK → BKK · 2 stops

found 2 days ago

See this route

Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.

Live price for these dates

The cheapest return found recently is for 20 Dec – 7 Jan 2027. A live search on this page shows what those dates cost now, for one adult in economy.

Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work