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$998+ Cheap flights from Portland, ME (PWM) to Bangkok

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — BKK
Mar 2 — Mar 91
Mon 3/2
Mon 3/9
1 adult, Economy
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Cheap flight deals from Portland to Bangkok

Cheapest flights from Portland to Bangkok
Explore the most affordable flight options available from Portland to Bangkok. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 31, 2026.

This Etihad Airways deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:02 am
PWM
-
BKK
2 stops36h 08m
Multiple Airlines
Sat 11/218:55 am
BKK
-
PWM
2 stops49h 38m
Multiple Airlines
Deal found 1/30$998
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/86:00 am
PWM
-
BKK
3 stops41h 25m
United Airlines
Thu 2/124:55 pm
BKK
-
PWM
3 stops62h 01m
United Airlines
Deal found 1/28$1,157
This United Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/19:34 am
PWM
-
BKK
2 stops31h 36m
United Airlines
Sat 11/213:40 pm
BKK
-
PWM
3 stops60h 09m
United Airlines
Deal found 1/30$1,173
This United Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/156:00 am
PWM
-
BKK
3 stops42h 25m
United Airlines
Sun 3/224:55 pm
BKK
-
PWM
3 stops39h 16m
United Airlines
Deal found 1/29$1,256
This Korean Air deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/85:30 am
PWM
-
BKK
2 stops31h 25m
Korean Air
Wed 2/112:05 am
BKK
-
PWM
2 stops33h 01m
Korean Air
Deal found 1/28$1,456
This IEagle deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/23:58 pm
PWM
-
BKK
2 stops38h 27m
Qatar Airways
Wed 2/48:30 pm
BKK
-
PWM
2 stops27h 35m
Qatar Airways
Deal found 1/29$1,561

Find flight deals from Portland to Bangkok

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Bangkok (TH1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 31, 2026.

Round-trip from

$1,256
(United Airlines)

Popular in

January

Cheapest in

November

Average price

$1,672
From Portland to Bangkok
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($77 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Bangkok that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 31, 2026.
Use the filters below to find and compare flights from Portland to Bangkok that are best for you.

Fly from

Portland

Fly to

Bangkok

Route

Depart

Return

Price

PortlandBangkok

PWM - BKK

PWMBKK

Portland

Sun 3/15

6:00 am-11:25 am

3 stops42h 25m

Bangkok Suvarnabhumi

Sun 3/22

4:55 pm-9:11 pm

3 stops39h 16m

$1,256

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Best time to book a flight from Portland to Bangkok

Have a flexible travel schedule? Discover the best time to fly to Bangkok from Portland 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 Portland to Bangkok

What is the cheapest month to book a flight from Portland, Maine to Bangkok?

Currently, February is the cheapest month in which you can book a flight from Portland, Maine to Bangkok (average of $737). Flying from Portland, Maine to Bangkok in June is currently the most expensive (average of $1,120). 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.

Reviews of airlines servicing Bangkok

Get insights into the airlines that provide service to Bangkok. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bangkok. Reviews last updated January 31, 2026.
Read through reviews of airlines operating flights from Portland to Bangkok, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,219 reviews

Comfort

7.3

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,219 reviews
United Airlines
7.4
Good
9,219 reviews

Comfort

7.3

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

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

  • What airport do you fly from for flights from Portland to Bangkok?

    Portland (PWM), located 2.9 mi from the city center, is the airport you fly out of when you book flights from Portland to Bangkok. 1 airline have flights from Portland to Bangkok on a regular basis. Booking flights from Portland to Bangkok should not be difficult; the airport handles an average of 0 outbound flights to Bangkok per day.

  • How long is the flight from Portland, Maine to Bangkok?

    United Airlines can get you from Portland, Maine to Bangkok in just under 42h 25m. Your travel time can differ by up to . There are 8429 mi between Portland, Maine and Bangkok.

  • What is the cheapest airline to fly from Portland, Maine to Bangkok round-trip?

    According to our current data, United Airlines ($1,047), offers the cheapest pricing from Portland, Maine to Bangkok. United Airlines is currently priced 16% below the average price you’ll pay for this route.

  • Can I find deals for flights from Portland to Bangkok that include hotel bookings?

    Yes. In addition to deals on Portland to Bangkok flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Bangkok?

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

  • Can I find deals for business class flights from Portland to Bangkok?

    Yes. Cheapflights offers flight deals from Portland to Bangkok 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 Portland, Maine to Bangkok?

    Currently, February is the cheapest month in which you can book a flight from Portland, Maine to Bangkok (average of $737). Flying from Portland, Maine to Bangkok in June is currently the most expensive (average of $1,120). 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

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Portland to Bangkok

Discover the top airline that operate flights from Portland to Bangkok. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,047Average$1,234FlexibilityNo cancel feeOn-time69%

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