In terms of precipitation, rainfall in Washington, D.C. Reagan-National Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Reagan-National Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Reagan-National Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

What is the cheapest time of day to fly from TH to DCA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Thailand to Washington, D.C. Reagan-National Airport as you normally would.

Can I find deals for flights from Thailand to Reagan-National that include hotel bookings?

Yes. In addition to deals on Thailand to Reagan-National flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Thailand to Reagan-National?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Thailand to Reagan-National.

Can I find deals for business class flights from Thailand to Reagan-National?

Yes. Cheapflights offers flight deals from Thailand to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

฿18,135+ Cheap Flights from Thailand to Washington, D.C. Reagan-National Airport

Cheap flight deals from Thailand to Reagan-National

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Thailand to Reagan-National
Explore the most affordable flight options available from Thailand to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2026.

Thu 5/1109:10 -

2 stops43h 35m

Sun 8/1106:25 -

3 stops41h 05m

Deal found 1/9฿33,707

Wed 28/1007:10 -

2 stops26h 20m

Sat 31/1017:10 -

3 stops31h 20m

Deal found 3/9฿33,773

Thu 12/1109:10 -

2 stops49h 20m

Mon 16/1115:30 -

3 stops32h 00m

Deal found 4/9฿34,069

Tue 3/1107:10 -

2 stops27h 20m

Sat 7/1108:30 -

3 stops39h 00m

Deal found 1/9฿35,120

Sat 3/1007:00 -

2 stops25h 14m

Sat 10/1019:00 -

2 stops27h 35m

Deal found 1/9฿35,383

Sun 1/1100:15 -

2 stops28h 24m

Fri 6/1120:50 -

2 stops38h 05m

Deal found 1/9฿37,715

Mon 7/911:35 -

2 stops41h 24m

Tue 15/918:59 -

2 stops28h 26m

Deal found 2/9฿40,081

Sat 31/1000:15 -

2 stops24h 23m

Sat 7/1106:08 -

2 stops28h 47m

Deal found 1/9฿41,296

Mon 7/911:35 -

2 stops41h 24m

Wed 16/918:59 -

2 stops28h 26m

Deal found 2/9฿48,491

Wed 18/1109:10 -

2 stops44h 45m

Mon 30/1111:00 -

2 stops31h 05m

Deal found 5/9฿48,787

Wed 4/1100:20 -

2 stops23h 06m

Mon 9/1106:00 -

2 stops28h 45m

Deal found 1/9฿51,448

Fri 4/911:35 -

2 stops39h 45m

Wed 16/918:59 -

2 stops28h 26m

Deal found 1/9฿51,546

Find flight deals from Thailand to Reagan-National

Round-trip from	฿33,707
One-way from	฿18,135
Popular in	August
Cheapest in	October
Average price	฿39,325

United Airlines
5/11-8/11
4 total stops
53h 24m total
Thailand to Washington, D.C.

Search Deals

12/11-31/12
3 total stops
40h 32m total
Thailand to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (฿248,854 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease (฿85,491 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

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Cheapflights Fare Finder

Use the filters below to find and compare flights from Thailand to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Thu 10/12

19:15-18:57

2 stops35h 42m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿19,285

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Thu 29/10

19:15-22:57

2 stops38h 42m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿21,650

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Fri 16/10

17:30-17:57

2 stops35h 27m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿21,782

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Tue 19/1

08:25-22:38

2 stops50h 13m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿21,847

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Sat 19/9

20:15-23:10

2 stops37h 55m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿21,880

Fastest return journey

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Fri 16/10

07:05-21:50

2 stops25h 45m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿22,669

Chiang MaiWashington, D.C.

CNX Chiang Mai - DCA Washington, D.C. Reagan-National

CNXDCA

Chiang Mai

Wed 13/1

08:05-20:00

3 stops47h 55m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿24,607

Chiang MaiWashington, D.C.

CNX Chiang Mai - DCA Washington, D.C. Reagan-National

CNXDCA

Chiang Mai

Fri 6/11

09:10-20:09

2 stops46h 59m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿24,804

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Sat 24/10

21:40-08:03

2 stops45h 23m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿26,578

Chiang MaiWashington, D.C.

CNX Chiang Mai - DCA Washington, D.C. Reagan-National

CNXDCA

Chiang Mai

Sat 16/1

10:35-16:03

3 stops41h 28m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿28,812

Flights are sorted by cheapest return flights first.

Deals found on 3/9

Showing 1-10 of 32 resultsSorted by cheapest first

Best time to book a flight from Thailand to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Thailand with our price prediction graph.

BKK-DCA

CNX-DCA

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Thailand to Washington, D.C. Reagan-National Airport

TH0-DCA

BKK-DCA

CNX-DCA

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from Thailand to Washington, D.C. Reagan-National Airport?
United Airlines, เดลต้า, and เอทิฮัดแอร์เวย์ can get you from Thailand to Washington, D.C. Reagan-National Airport in just under 25h 20m. Your travel time can differ by up to 19h 25m. The distance between Thailand and Washington, D.C. Reagan-National Airport is about 14157 km. Both multi-stop and direct flights can be found to your destination and back.
Can I find deals for flights from Thailand to Reagan-National that include hotel bookings?
Yes. In addition to deals on Thailand to Reagan-National flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Thailand to Reagan-National?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Thailand to Reagan-National.
Can I find deals for business class flights from Thailand to Reagan-National?
Yes. Cheapflights offers flight deals from Thailand to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Thailand to Reagan-National. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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Cheapflights helps you find that perfect flight to Reagan-National from Thailand by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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Cheap flights from Thailand to Washington, D.C. Reagan-National Airport from ฿18,135

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Thailand to Reagan-National

Cheapest flights from Thailand to Reagan-NationalExplore the most affordable flight options available from Thailand to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2026.

Explore the most affordable flight options available from Thailand to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2026.

Best flights from Thailand to Reagan-NationalDiscover carefully curated flight deals from Thailand to Reagan-National that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 September 2026.

Discover carefully curated flight deals from Thailand to Reagan-National that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 September 2026.

Last-minute flights from Thailand to Reagan-NationalDiscover last-minute flight deals from Thailand to Reagan-National. Data last updated 5 September 2026 and is based on user searches.

Discover last-minute flight deals from Thailand to Reagan-National. Data last updated 5 September 2026 and is based on user searches.

One-way flights from Thailand to Reagan-NationalSearch for one-way flight options from Thailand to Reagan-National. Find affordable one-way fares based on user searches. Data last updated 5 September 2026.

Search for one-way flight options from Thailand to Reagan-National. Find affordable one-way fares based on user searches. Data last updated 5 September 2026.

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Cheapflights Fare Finder

Use the filters below to find and compare flights from Thailand to Washington, D.C. Reagan-National Airport that are best for you.

Best time to book a flight from Thailand to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Thailand with our price prediction graph.

Cheapflights Insights

Related info for your journey

How long is the flight from Thailand to Washington, D.C. Reagan-National Airport?

Can I find deals for flights from Thailand to Reagan-National that include hotel bookings?

How can I find direct flights from Thailand to Reagan-National?

Can I find deals for business class flights from Thailand to Reagan-National?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Thailand to Reagan-National

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Reagan-National by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Thailand to Reagan-National by cabin class

Find flights from Thailand to Reagan-National, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Thailand and Reagan-National flights

Browse other Thailand and Reagan-National flight options. Last updated on 5 September 2026.

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Cheapest flights from Thailand to Reagan-National
Explore the most affordable flight options available from Thailand to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2026.

Best flights from Thailand to Reagan-National
Discover carefully curated flight deals from Thailand to Reagan-National that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 September 2026.

Last-minute flights from Thailand to Reagan-National
Discover last-minute flight deals from Thailand to Reagan-National. Data last updated 5 September 2026 and is based on user searches.

One-way flights from Thailand to Reagan-National
Search for one-way flight options from Thailand to Reagan-National. Find affordable one-way fares based on user searches. Data last updated 5 September 2026.