Route brief · WAS → BKK
Washington → Bangkok
$516
−47% vs typical
seasonal median $975 · difference $459
Oct 25 – Dec 15 · 51 nights
Etihad1 stop
- Usual monthly lows
- $842–$1,114
- Board rank
- Stronger than 94%
- Route sample
- 6 observed months
Cached fare — the booking search re-prices live before you pay.
Destination briefBKKBangkokThe backpacker cliché that still delivers: gold temples, boat noodles, $12 street-food feasts.Best windowNov–FebAirportsSuvarnabhumi (BKK) · Don Mueang (DMK)All routes into BangkokWhen this route gets cheap.
Cached-fare history: across 6 months, Oct is the cheapest for WAS → BKK. Best time to be there: Nov–Feb.
Fares bottom out in October around $516 and peak in December near $1,577 — a $1,061 spread across the 6 months we track. The cheapest itinerary we are tracking makes one stop and takes about 19 hours outbound, on a 51-night trip — ticketed under Etihad, which on a connecting fare need not operate every leg. At $516 for 14,155 km each way, that works out to about $18 per 1,000 km flown. That is well under the $40 that ultra-long-haul fares on this board typically run. Across the 13 departure cities we track at a similar distance from Bangkok, this fare ranks 4th — 34% above the $386 from Los Angeles. It is also the cheapest of the 27 routes of similar length we watch out of Washington.
The 6 days we hold a cached fare for
Tap a date → live search
The median cached fare across this calendar is 22% lower than when tracking began on Aug 8 — $1,122 then versus $880 now, across 7 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 $516, on Oct 25.
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.
Cheapest in Oct · around $516
47% below the $975 typical fare
Cheapest round-trip fare found per month · Washington → Bangkok · cached-price history
Route facts
- Airports
- Dulles (IAD) · Reagan National (DCA) · Baltimore (BWI) ↔ Suvarnabhumi (BKK) · Don Mueang (DMK)
- Flight time
- ~19 hours outbound
- Distance
- ~14,155 km each way
- Typical price
- $975 round-trip (seasonal median)
- Airlines on the board
- Etihad
- Itineraries
- Connections on current fares
- Best months to visit
- Nov–Feb
WAS → BKK, answered.
Is $516 a good price for Washington to Bangkok?
Yes — the seasonal median for this route is around $975 round-trip. At $516 you're 47% below that, saving about $459, which we rate rare for this route.
What is the cheapest month to fly from Washington to Bangkok?
Across 6 months of cached-fare history, Oct comes out cheapest on this route. The best months to actually be in Bangkok are Nov–Feb — when those overlap, that's your window.
How far in advance should I book WAS → Bangkok?
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. What we can measure is which month is cheap: across 6 months of cached fares, Oct comes out lowest on this route. See /guides/what-moves-a-flight-price/ for what does move a fare.
Are there nonstop flights from Washington to Bangkok?
The current cheapest fares involve a connection, ticketed under Etihad. Nonstop options exist on many dates at higher prices — check the live search for your exact dates.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on August 30). 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 Bangkok?
Lock the flight first — then compare stays for Oct 25 – Dec 15 · 51 nights.
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Missed it?
Cached fares expire. This route has a feed of its own — follow it and the next WAS → BKK drop reaches you as soon as we find it.
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