What is the cheapest month to book a flight from Thailand to Washington, D.C. Reagan-National Airport?

Currently, February is the cheapest month in which you can book a flight from Thailand to Washington, D.C. Reagan-National Airport (average of $278). Flying from Thailand to Washington, D.C. Reagan-National Airport in March is currently the most expensive (average of $335). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

In terms of precipitation, rainfall in Washington, D.C. Reagan-National Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Reagan-National Airport when rainfall is around 2.6 in.

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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What is the cheapest month to fly from Thailand to Washington, D.C. Reagan-National Airport?

Flights from Thailand to Washington, D.C. Reagan-National Airport lean towards being more expensive in August. Prices are generally better when you fly from Thailand to Washington, D.C. Reagan-National Airport in January, with the cheapest ticket starting at $984.

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 vacation 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.

$629+ Flights from Thailand to Washington, D.C. Reagan-National Airport

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Thailand to Reagan-National with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Thailand to Reagan-National

Round-trip from	$987 (FlightHub)
One-way from	$661 (Kiwi.com)
Popular in	August
Cheapest in	January
Average price	$1,849

From Thailand to Washington, D.C. Reagan-National

Search Deals

One-way flight from Thailand to Washington, D.C. Reagan-National

Search Deals

Highest demand for flights based on searches. 11% potential increase in price ($150 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($60 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Thailand to Reagan-National

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 agosto 7, 2025.

mié. 10/110:05 pmBKK - DCA

2 stops33h 54mJapan Airlines

mar. 10/287:06 pmDCA - BKK

2 stops34h 14mJapan Airlines

Deal found 8/5

$976

jue. 9/410:05 pmBKK - DCA

2 stops29h 17mJapan Airlines

jue. 9/116:45 amDCA - BKK

2 stops29h 15mJapan Airlines

Deal found 8/6

$987

jue. 9/1810:05 pmBKK - DCA

2 stops29h 17mJapan Airlines

mar. 9/236:45 amDCA - BKK

2 stops29h 15mJapan Airlines

Deal found 8/4

$988

lun. 9/110:05 pmBKK - DCA

2 stops29h 06mJapan Airlines

jue. 9/47:23 pmDCA - BKK

2 stops32h 47mJapan Airlines

Deal found 8/5

$1,006

sáb. 9/610:05 pmBKK - DCA

2 stops29h 17mJapan Airlines

vie. 9/126:45 amDCA - BKK

2 stops29h 15mJapan Airlines

Deal found 8/6

$1,018

lun. 9/19:35 amBKK - DCA

2 stops47h 02mUnited Airlines

sáb. 9/205:00 pmDCA - BKK

2 stops48h 35mUnited Airlines

Deal found 8/6

$1,042

vie. 9/197:00 amBKK - DCA

2 stops26h 09mUnited Airlines

lun. 9/2210:30 amDCA - BKK

2 stops31h 05mUnited Airlines

Deal found 8/4

$1,043

mié. 9/179:35 amBKK - DCA

2 stops39h 41mUnited Airlines

mié. 10/152:56 pmDCA - BKK

2 stops45h 59mUnited Airlines

Deal found 8/6

$1,045

mar. 11/1810:05 pmBKK - DCA

2 stops34h 39mJapan Airlines

sáb. 11/295:45 pmDCA - BKK

2 stops34h 35mJapan Airlines

Deal found 8/6

$1,074

mié. 10/12:40 amBKK - DCA

2 stops53h 19mChina Airlines

mié. 10/299:59 amDCA - BKK

2 stops28h 36mChina Airlines

Deal found 8/5

$1,087

vie. 8/89:35 amBKK - DCA

2 stops63h 38mUnited Airlines

vie. 8/157:00 amDCA - BKK

2 stops34h 35mUnited Airlines

Deal found 8/7

$1,088

jue. 12/45:50 pmBKK - DCA

2 stops39h 05mChina Airlines

mié. 6/109:00 amDCA - BKK

2 stops40h 10mChina Airlines

Deal found 8/6

$1,099

Best flights from Thailand to Reagan-National
Discover carefully curated flight deals from Thailand to Reagan-National that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated agosto 7, 2025.

mié. 10/110:05 pmBKK - DCA

2 stops33h 54mJapan Airlines

mar. 10/287:06 pmDCA - BKK

2 stops34h 14mJapan Airlines

Deal found 8/5

$976

lun. 9/19:35 amBKK - DCA

2 stops47h 02mUnited Airlines

sáb. 9/205:00 pmDCA - BKK

2 stops48h 35mUnited Airlines

Deal found 8/6

$1,042

mié. 10/12:40 amBKK - DCA

2 stops53h 19mChina Airlines

mié. 10/299:59 amDCA - BKK

2 stops28h 36mChina Airlines

Deal found 8/5

$1,087

mié. 8/2711:15 pmCNX - DCA

2 stops33h 46mDelta

dom. 11/306:00 amDCA - CNX

2 stops29h 05mDelta

Deal found 8/5

$1,099

vie. 9/191:30 pmBKK - DCA

3 stops33h 38mMultiple Airlines

vie. 9/268:40 pmDCA - BKK

2 stops34h 00mMultiple Airlines

Deal found 8/4

$1,105

lun. 9/2211:35 amCNX - DCA

2 stops41h 24mEVA Air

lun. 1/195:30 pmDCA - CNX

2 stops29h 05mEVA Air

Deal found 8/5

$1,167

jue. 9/410:05 pmBKK - DCA

2 stops29h 17mJapan Airlines

jue. 9/116:45 amDCA - BKK

2 stops29h 15mJapan Airlines

Deal found 8/6

$987

vie. 9/197:00 amBKK - DCA

2 stops26h 09mUnited Airlines

lun. 9/2210:30 amDCA - BKK

2 stops31h 05mUnited Airlines

Deal found 8/4

$1,043

jue. 9/1810:05 pmBKK - DCA

2 stops29h 17mJapan Airlines

mar. 9/236:45 amDCA - BKK

2 stops29h 15mJapan Airlines

Deal found 8/4

$988

jue. 12/45:50 pmBKK - DCA

2 stops39h 05mChina Airlines

mié. 6/109:00 amDCA - BKK

2 stops40h 10mChina Airlines

Deal found 8/6

$1,099

mié. 9/179:35 amBKK - DCA

2 stops39h 41mUnited Airlines

mié. 10/152:56 pmDCA - BKK

2 stops45h 59mUnited Airlines

Deal found 8/6

$1,045

lun. 9/110:05 pmBKK - DCA

2 stops29h 06mJapan Airlines

jue. 9/47:23 pmDCA - BKK

2 stops32h 47mJapan Airlines

Deal found 8/5

$1,006

Last-minute flights from Thailand to Reagan-National
Discover last-minute flight deals from Thailand to Reagan-National. Data last updated agosto 7, 2025 and is based on user searches.

vie. 8/89:35 amBKK - DCA

2 stops63h 38mUnited Airlines

vie. 8/157:00 amDCA - BKK

2 stops34h 35mUnited Airlines

Deal found 8/7

$1,088

mar. 8/121:35 amBKK - DCA

2 stops31h 07mEVA Air

jue. 11/139:59 amDCA - BKK

2 stops36h 46mEVA Air

Deal found 8/6

$1,315

mar. 8/121:20 amBKK - DCA

2 stops31h 28mAir Canada

jue. 11/139:40 amDCA - BKK

2 stops24h 50mAir Canada

Deal found 8/6

$2,112

mié. 8/137:00 amBKK - DCA

2 stops24h 56mUnited Airlines

jue. 11/136:30 amDCA - BKK

2 stops29h 35mUnited Airlines

Deal found 8/6

$1,280

sáb. 8/162:35 amBKK - DCA

2 stops30h 25mDelta

mié. 8/206:00 amDCA - BKK

2 stops28h 45mDelta

Deal found 8/6

$1,971

dom. 8/177:00 amBKK - DCA

2 stops25h 27mUnited Airlines

mié. 8/206:25 amDCA - BKK

2 stops35h 10mUnited Airlines

Deal found 8/5

$1,292

dom. 8/173:15 pmBKK - DCA

2 stops37h 43mMultiple Airlines

mié. 8/206:59 pmDCA - BKK

2 stops29h 21mMultiple Airlines

Deal found 8/6

$1,514

mié. 8/2711:15 pmCNX - DCA

2 stops33h 46mDelta

dom. 11/306:00 amDCA - CNX

2 stops29h 05mDelta

Deal found 8/5

$1,099

lun. 9/110:05 pmBKK - DCA

2 stops29h 06mJapan Airlines

jue. 9/47:23 pmDCA - BKK

2 stops32h 47mJapan Airlines

Deal found 8/5

$1,006

lun. 9/19:35 amBKK - DCA

2 stops47h 02mUnited Airlines

sáb. 9/205:00 pmDCA - BKK

2 stops48h 35mUnited Airlines

Deal found 8/6

$1,042

lun. 9/110:05 pmBKK - DCA

2 stops29h 06mJapan Airlines

sáb. 9/67:23 pmDCA - BKK

2 stops32h 47mJapan Airlines

Deal found 8/6

$1,133

jue. 9/410:05 pmBKK - DCA

2 stops29h 17mJapan Airlines

jue. 9/116:45 amDCA - BKK

2 stops29h 15mJapan Airlines

Deal found 8/6

$987

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 agosto 7, 2025.

vie. 11/147:05 amCNX - DCA

3 stops48h 55mMultiple Airlines

Deal found 8/6

$629

mar. 8/2611:10 pmBKK - DCA

2 stops32h 49mMultiple Airlines

Deal found 8/6

$661

mié. 8/2711:15 pmCNX - DCA

2 stops35h 31mDelta

Deal found 8/5

$664

lun. 12/12:35 amBKK - DCA

2 stops49h 40mChina Airlines

Deal found 8/6

$668

mar. 9/25:50 pmBKK - DCA

2 stops35h 09mMultiple Airlines

Deal found 8/7

$670

jue. 11/132:35 amBKK - DCA

2 stops53h 25mChina Airlines

Deal found 8/5

$672

mar. 9/92:40 amBKK - DCA

2 stops53h 19mChina Airlines

Deal found 8/6

$673

mié. 8/201:10 pmBKK - DCA

3 stops38h 49mMultiple Airlines

Deal found 8/5

$678

mar. 10/141:45 amBKK - DCA

2 stops30h 29mMultiple Airlines

Deal found 8/6

$682

jue. 8/215:50 pmBKK - DCA

3 stops39h 09mMultiple Airlines

Deal found 8/5

$687

lun. 11/245:55 pmBKK - DCA

2 stops33h 04mAir India

Deal found 8/6

$691

dom. 11/238:15 amBKK - DCA

2 stops26h 20mAir Canada

Deal found 8/6

$702

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

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

mié. 10/1

10:05 pm-8:59 pm

2 stops33h 54m

Washington, D.C. Reagan-National

mar. 10/28

7:06 pm-4:20 pm

2 stops34h 14m

$976

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

jue. 9/4

10:05 pm-4:22 pm

2 stops29h 17m

Washington, D.C. Reagan-National

jue. 9/11

6:45 am-11:00 pm

2 stops29h 15m

$987

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

jue. 9/18

10:05 pm-4:22 pm

2 stops29h 17m

Washington, D.C. Reagan-National

mar. 9/23

6:45 am-11:00 pm

2 stops29h 15m

$988

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

lun. 9/1

10:05 pm-4:11 pm

2 stops29h 06m

Washington, D.C. Reagan-National

jue. 9/4

7:23 pm-3:10 pm

2 stops32h 47m

$1,006

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

sáb. 9/6

10:05 pm-4:22 pm

2 stops29h 17m

Washington, D.C. Reagan-National

vie. 9/12

6:45 am-11:00 pm

2 stops29h 15m

$1,018

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

lun. 9/1

9:35 am-9:37 pm

2 stops47h 02m

Washington, D.C. Reagan-National

sáb. 9/20

5:00 pm-4:35 am

2 stops48h 35m

$1,042

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

vie. 9/19

7:00 am-10:09 pm

2 stops26h 09m

Washington, D.C. Reagan-National

lun. 9/22

10:30 am-4:35 am

2 stops31h 05m

$1,043

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

mié. 9/17

9:35 am-2:16 pm

2 stops39h 41m

Washington, D.C. Reagan-National

mié. 10/15

2:56 pm-11:55 pm

2 stops45h 59m

$1,045

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

mar. 11/18

10:05 pm-8:44 pm

2 stops34h 39m

Washington, D.C. Reagan-National

sáb. 11/29

5:45 pm-4:20 pm

2 stops34h 35m

$1,074

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

mié. 10/1

2:40 am-8:59 pm

2 stops53h 19m

Washington, D.C. Reagan-National

mié. 10/29

9:59 am-1:35 am

2 stops28h 36m

$1,087

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/6

Showing 1-10 of 40 results

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.

Estimated round-trip 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

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.

Reviews of airlines servicing Reagan-National

Read through reviews of airlines operating flights from Thailand to Washington, D.C. Reagan-National Airport, such as EVA Air, Korean Air, and Japan Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

EVA Air

8.4

Very good

1,225 reviews

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

EVA Air

8.4

Very good

1,225 reviews

EVA Air

8.4

Very good

1,225 reviews

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Korean Air

8.4

Very good

1,121 reviews

EVA Air

8.4

Very good

1,225 reviews

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Japan Airlines

8.3

Very good

1,545 reviews

EVA Air

8.4

Very good

1,225 reviews

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

China Airlines

8.3

Very good

760 reviews

EVA Air

8.4

Very good

1,225 reviews

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Delta

8.0

Very good

7,987 reviews

EVA Air

8.4

Very good

1,225 reviews

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Related info for your journey

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 vacation 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.
What is the cheapest month to book a flight from Thailand to Washington, D.C. Reagan-National Airport?
Currently, February is the cheapest month in which you can book a flight from Thailand to Washington, D.C. Reagan-National Airport (average of $278). Flying from Thailand to Washington, D.C. Reagan-National Airport in March is currently the most expensive (average of $335). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Woodbridge

Arlington

Alexandria

Tysons

Silver Spring

Fredericksburg

Gaithersburg

Towson

Linthicum Heights

Easton

Fairfax

Manassas

Falls Church

Laurel

Rockville

Oxon Hill

Springfield

National Harbor

Dundalk

Waldorf

Browse thousands of different options on Cheapflights for your next trip

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$629+ Cheap flights from Thailand to Reagan-National (DCA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Thailand to Reagan-National with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Thailand to Reagan-National

Keep the following information in mind while searching for Thailand to Reagan-National flight deals. Data was last updated agosto 7, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 agosto 7, 2025.

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 agosto 7, 2025.

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

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

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

Find hourly flight availability from Thailand to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 7, 2025.

Reviews of airlines servicing Reagan-National

Read through reviews of airlines operating flights from Thailand to Washington, D.C. Reagan-National Airport, such as EVA Air, Korean Air, and Japan Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Thailand to Reagan-National. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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?

What is the cheapest month to book a flight from Thailand to Washington, D.C. Reagan-National Airport?

Traveling to a place near Washington, D.C. Reagan-National Airport?

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.

100% Free

Book with Flexibility

Travel Smart

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 agosto 7, 2025.