Washington (IAD) → Bangkok (BKK)
About Washington to Bangkok Flights
Discover the best flights from Washington to Bangkok, covering 14,158 km in approximately 18h 12m. Washington (IAD) to Bangkok (BKK) is one of the major long-haul routes connecting United States and Thailand. With 7 major airlines operating this route, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from Washington to Bangkok.
12-Month Price History
Flight prices from Washington to Bangkok vary significantly throughout the year. February typically offers the best deals with average prices around $2515, while July sees the highest prices, averaging $4221. Savvy travelers can save up to 40% by choosing their travel dates wisely.
Best Time to Fly
Cheapest Month
February
Save up to 40% on average
Most Expensive
July
Peak season pricing
Book in Advance
173 days
For best prices
Booking Tips
For the best prices on Washington to Bangkok flights, we recommend booking 111 days in advance. International flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.
Airlines Serving This Route
| Airline | Economy | Business | First |
|---|---|---|---|
American Airlines AA | $4800 | $17150 | $26890 |
United Airlines UA | $4840 | $16310 | $27570 |
Air France AF | $4900 | $19300 | $30220 |
Thai VietJet Air VZ | $5060 | $15350 | $22140 |
Thai Airways TG | $5250 | $14240 | $23560 |
British Airways BA | $5350 | $19630 | $28970 |
Delta Air Lines DL | $5630 | $14360 | $25320 |
American Airlines
AA
Economy
$4800
Business
$17150
First
$26890
United Airlines
UA
Economy
$4840
Business
$16310
First
$27570
Air France
AF
Economy
$4900
Business
$19300
First
$30220
Thai VietJet Air
VZ
Economy
$5060
Business
$15350
First
$22140
Thai Airways
TG
Economy
$5250
Business
$14240
First
$23560
British Airways
BA
Economy
$5350
Business
$19630
First
$28970
Delta Air Lines
DL
Economy
$5630
Business
$14360
First
$25320
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Alternative Flight Options
Washington → Bangkok
Ronald Reagan Washington National (DCA) to Suvarnabhumi (BKK)
Distance: 14,168 km
Average price: $2893
Washington → Bangkok
Washington Dulles International (IAD) to Don Mueang International (DMK)
Distance: 14,133 km
Average price: $2886
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Frequently Asked Questions
How long is the flight from Washington to Bangkok?
The flight time from Washington (IAD) to Bangkok (BKK) is approximately 18 hours and 12 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between Washington and Bangkok?
The aerial distance between Washington and Bangkok is 14,158 kilometers (8,797 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Washington to Bangkok?
Several airlines operate flights between Washington and Bangkok, including United Airlines, Thai Airways, Thai VietJet Air and 4 more airlines. Most flights on this route include one or more stops.
What is the cheapest month to fly from Washington to Bangkok?
Based on historical data, February typically offers the lowest airfares for flights from Washington to Bangkok. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.
How far in advance should I book my flight to Bangkok?
For the best prices on Washington to Bangkok flights, we recommend booking 109 days in advance. International flights generally require earlier booking than domestic routes.
Do I need a visa to travel from Washington to Bangkok?
Visa requirements depend on your nationality and the purpose of your visit. Citizens of United States traveling to Thailand should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.
What is the time difference between Washington and Bangkok?
Washington operates on America/New_York time zone, while Bangkok is in the Asia/Bangkok time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.