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.

฿18,878+ 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 24 September 2026.

Thu 5/1109:10 -

2 stops25h 20m

Sun 8/1115:30 -

3 stops56h 00m

Deal found 20/9฿34,193

Thu 12/1107:10 -

2 stops27h 20m

Mon 16/1106:25 -

2 stops34h 45m

Deal found 18/9฿34,260

Wed 7/1007:00 -

2 stops27h 59m

Mon 23/1108:30 -

2 stops26h 20m

Deal found 20/9฿34,360

Tue 20/1007:00 -

2 stops25h 14m

Fri 27/1108:00 -

2 stops26h 50m

Deal found 22/9฿34,493

Wed 14/1015:45 -

3 stops28h 09m

Tue 20/1006:00 -

2 stops29h 15m

Deal found 22/9฿34,759

Tue 20/1007:00 -

2 stops25h 59m

Thu 12/1106:25 -

2 stops28h 25m

Deal found 22/9฿35,792

Tue 20/1015:45 -

1 stop35h 28m

Sat 31/1010:30 -

2 stops31h 40m

Deal found 20/9฿36,457

Find flight deals from Thailand to Reagan-National

Round-trip from	฿34,193
One-way from	฿18,878
Popular in	April
Cheapest in	October
Average price	฿38,355

United Airlines
5/11-12/11
5 total stops
57h 20m total
Thailand to Washington, D.C.

Search Deals

5/11-31/12
3 total stops
53h 52m total
Thailand to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 16% potential increase in price (฿265,120 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (฿70,555 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.

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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 29/10

19:15-22:57

2 stops38h 42m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿20,876

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Tue 15/12

19:15-18:57

2 stops35h 42m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿22,074

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Thu 26/11

17:50-16:04

2 stops34h 14m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿22,274

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Mon 30/11

09:50-16:05

2 stops42h 15m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿27,302

Fastest return journey

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Fri 16/10

07:55-21:59

2 stops25h 04m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿27,768

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Thu 15/10

21:40-21:59

2 stops35h 19m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿28,034

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Tue 13/10

15:45-10:44

3 stops29h 59m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿29,932

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Thu 12/11

16:55-08:55

3 stops28h 00m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿29,932

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Mon 2/11

16:55-11:47

3 stops30h 52m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿29,932

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Sat 17/10

15:45-12:08

3 stops31h 23m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿29,932

Flights are sorted by cheapest return flights first.

Deals found on 23/9

Showing 1-10 of 24 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

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

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 and เดลต้า can get you from Thailand to Washington, D.C. Reagan-National Airport in just under 25h 49m. Your travel time can differ by up to 17h 46m. 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

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Cheap flights from Thailand to Washington, D.C. Reagan-National Airport from ฿18,878

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/11. 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 24 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 24 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 24 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 24 September 2026.

Last-minute flights from Thailand to Reagan-NationalDiscover last-minute flight deals from Thailand to Reagan-National. Data last updated 24 September 2026 and is based on user searches.

Discover last-minute flight deals from Thailand to Reagan-National. Data last updated 24 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 24 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 24 September 2026.

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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 24 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 24 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 24 September 2026.

Last-minute flights from Thailand to Reagan-National
Discover last-minute flight deals from Thailand to Reagan-National. Data last updated 24 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 24 September 2026.