Skyline view of Bangkok highlighting traditional Thai architecture amidst modern buildings. — flights from Washington to Bangkok
DullesBangkok, Thailand

Flights from Dulles to Bangkok

Flying time from Dulles (IAD) to Bangkok (BKK) is about 18h 12m (14,160 km). Lowest fare seen: $359 one-way, 1 stop (12 Oct 2026).

All flights from Dulles →All flights to Bangkok →

Photo of Bangkok: Zaonar Saizainalin on Pexels.

When you land in Bangkok

The airport transfer and the few things worth sorting before you fly.

Skyline view of Bangkok highlighting traditional Thai architecture amidst modern buildings. — arriving in Bangkok

Airport transfer

BKK → Bangkok, booked before you fly

A private driver meets you in arrivals at a price agreed when you book. Book with Welcome Pickups.

See transfer prices
Before you flyAirport lounges at Washington Dulles →3 lounges at Washington Dulles AirportTrains, buses and taxi faresBKK to Bangkok: getting into town →Early arrival or late flightLuggage storage in Bangkok →23 drop-off points

Things to book in Bangkok

All 77 things to do in Bangkok →
Stunning view of the MahaNakhon skyscraper in Bangkok against a clear blue sky.from €9.29
Mahanakhon SkyWalk 4.6 · 538 Tiqets reviews
from €16.46
Bangkok Dinner Cruises 4.0 · 90 Tiqets reviews
from €12.79
Bangkok Martial Arts Classes 4.9 · 85 Tiqets reviews
from €26.56
Rajadamnern Muay Thai Stadium 4.9 · 85 Tiqets reviews

Find hotels in Bangkok

Hotels, hostels & more · Trip.com

Search hotels

Airlines flying Dulles to Bangkok

We have not confirmed which airlines fly IAD–BKK nonstop. Search the route to see every carrier selling it today, including connections.

Dulles to Bangkok fares by month

With stops: Nov 2026, from $310. Lowest one-way fares seen for departures in each month, read 22 Oct 2026.

DepartingNonstop fromCheaper with stops
Oct 2026—$608 · 2 stops24 Oct 2026
Nov 2026—$310 · 1 stop25 Nov 2026
Dec 2026—$560 · 1 stop6 Dec 2026
Jan 2027—$591 · 2 stops4 Jan 2027

When to go for the lowest fare

The next few weeks were the cheapest to fly: from $310 in November 2026, against $560 at best later on.

From Travelpayouts flight-search data, city to city (Dulles to Bangkok, any airport), USD, read 22 Oct 2026. These are fares that were on sale, not a guarantee of today's price; an airline is named only where we know it flies this route.

Best time to fly to Bangkok

Based on weather and travel conditions in Thailand

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Best monthsGoodAvoid if possible

The cool, dry season (November–February) is ideal — sunny skies, low humidity, and comfortable temperatures around 25–30°C. The monsoon (May–October) brings heavy rain especially in the south.

Peak season: November – February

More for this trip

Frequently asked questions — Dulles to Bangkok flights

How long is the flight from Dulles to Bangkok?
Dulles (IAD) and Bangkok (BKK) are 14,160 km apart, about 18h 12m of flying time. We have not seen a nonstop fare on this pair, so expect to connect — the cheapest itinerary seen had 1 stop, which adds to the total journey time.
How far is Dulles from Bangkok by air?
The great-circle distance between Washington Dulles International Airport and Suvarnabhumi Airport is 14,160 km (8,799 miles), a ultra long-haul route.
How much does a flight from Dulles to Bangkok cost?
The lowest one-way fare seen recently on IAD–BKK was $359 USD with Air Premia (1 stop), departing 6 Dec 2026, found in fare searches as of 12 Oct 2026. Fares change constantly and depend on the date, so check the current price before booking.
What is the cheapest month to fly from Dulles to Bangkok?
In fares seen on 22 Oct 2026, departures in November 2026 were cheapest, from $310 one-way, against $608 for October 2026, the dearest month. Fares change daily, so check your own dates.
Do I need a visa to travel from Dulles to Thailand?
It depends on your passport. Some nationalities can enter Thailand visa-free or get a visa on arrival; others must apply in advance. Use AirConnect's Visa Checker to see the rules for your passport.
What is the best time to visit Bangkok?
The cool, dry season (November–February) is ideal — sunny skies, low humidity, and comfortable temperatures around 25–30°C. The monsoon (May–October) brings heavy rain especially in the south.

Sources: fares from Travelpayouts flight-search data, seen 12 Oct 2026; airlines from each carrier's published network and nonstop fares on sale; distance from OurAirports coordinates; flight time estimated from distance. Fares change daily.

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