Rare1 stop · 16.5h
BKK to BCNSpain
Barcelona
$516
usually $870
−41%
Most monthly lows $697–$881. Cheaper than every other month on record (5).
Flights · BKK → WAS
Bangkok to Washington
Best fare, round trip
$1,445
Too little price history on this route to compare — the fare is shown as found.
Found
- Depart
- Thu 31 Dec
- Return
- Sun 10 Jan
- Stay
- 10 nights
- Flight
- 1 stop · 22.5h
- Airline
Saudia
Cached fare — the booking search re-prices live before you pay.
United StatesWashingtonFree museums by the dozen, and three airports competing hard enough to keep transatlantic fares honest.Best windowApr–May · Sep–OctAirportsDulles (IAD) · Reagan National (DCA) · Baltimore (BWI)Every route into WashingtonFare seasonality
When this route gets cheap.
The cheapest itinerary we are tracking makes one stop and takes about 22.5 hours outbound, on a 10-night trip — ticketed under Saudia, which on a connecting fare need not operate every leg. At $1,445 for 14,155 km each way, that works out to about $51 per 1,000 km flown. That is above the $42 per 1,000 km typical of ultra-long-haul fares here. Across the 9 departure cities we track at a similar distance from Washington, this fare ranks 8th — 2.4× the $610 we hold from Kuala Lumpur. For context, the middle fare among the 17 routes of similar length we watch out of Bangkok is $1,356. We have 1 month of cached prices for this route so far — not enough to call a fare cheap or expensive, so we publish the price without a percentage. Fare history here is still too short to name a cheap season. The best time to be in Washington: Apr–May · Sep–Oct.
The one day we hold a cached fare for
Press a date to compare its fares
The median cached fare across this calendar is 40% higher than when tracking began on 19 Aug — $1,029 then versus $1,445 now, across 11 recorded snapshots. This is a calendar-level trend, so an individual deal above can be lower. The lowest single day we have seen here is $764, on 22 Sep.
These are the only days we have a cached price for on this route so far — not the only days it flies. The search above covers any date.
Cached fares · checked 15 Oct 2026
We are still collecting this route's months — 1 month of cached prices so far, too few to chart.
Route facts
- Airports
- Suvarnabhumi (BKK) · Don Mueang (DMK) ↔ Dulles (IAD) · Reagan National (DCA) · Baltimore (BWI)
- Flight time
- ≈22.5 hours outbound
- Distance
- ≈14,155 km each way
- Airlines on the board
- Saudia
- Itineraries
- Connections on current fares
- Best months to visit
- Apr–May · Sep–Oct
Good to know
BKK → WAS, answered.
How far in advance should I book BKK → Washington?
We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. Our guide Why flight prices change covers the levers we can measure.
Are there nonstop flights from Bangkok to Washington?
The current cheapest fares involve a connection, ticketed under Saudia. We hold no nonstop fare on this route right now, which does not mean none flies — search your exact dates to see what does.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on 17 October). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.
Next step
Sleeping in Washington?
Lock the flight first — then compare stays for 31 Dec – 10 Jan '27 · 10 nights.
Browse hotelsMissed it?
Cached fares expire. This route has a feed of its own — follow it and the next BKK → WAS drop reaches you as soon as we find it.
Follow this route’s feedKeep browsing
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$566
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$191
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