In terms of precipitation, rainfall in Vietnam ranges from 0.0 - 13.4 inches per month. September is typically the wettest month, when rainfall can reach 13.4 in. February is typically the driest time to visit Vietnam when rainfall is around 0.0 in.

If weather is an important factor for your trip to Vietnam, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).

What is the cheapest time of day to fly from PWM to VN?

When flying from Portland, Maine to Vietnam, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly from for flights from Portland to Vietnam?

Located just 2.9 mi from the city center, Portland (PWM) is the airport most travelers will use when flying to Vietnam from Portland.

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

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

How can I find direct flights from Portland to Vietnam?

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

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

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

Find Flights from Portland, ME to Vietnam

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

Find cheap flights from Portland to Vietnam 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.

Find flight deals from Portland to Vietnam

Most accurate provider	Gotogate 3 stars
Most trusted provider	Gotogate 3 stars
Popular in	June
Cheapest in	September
Average price	$1,380

Provider with most accurate pricing for Boston Logan Intl-Ho Chi Minh City flight deals.

Search Deals

Provider most trusted by Cheapflights users for Boston Logan Intl-Ho Chi Minh City flights.

Search Deals

Highest demand for flights based on searches. 17% potential increase in price ($235 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($32 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Insights

Everything you need to know about your flight from Portland to Vietnam

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

Currently, March is the cheapest month in which you can book a flight from Portland, Maine to Vietnam (average of $640). Flying from Portland, Maine to Vietnam in June is currently the most expensive (average of $1,117). 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 Vietnam

See what other customers who have flown with United Airlines from Portland to Vietnam have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

9,095 reviews

Reviews

1 / 20

10.0

Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

United Airlines

7.4

Good

9,095 reviews

United Airlines

7.4

Good

9,095 reviews

Reviews

1 / 20

10.0

Excellent

Michelle,Dec 2025

DEN - MKE

Related info for your journey

What airport do you fly from for flights from Portland to Vietnam?
Located just 2.9 mi from the city center, Portland (PWM) is the airport most travelers will use when flying to Vietnam from Portland.
Can I find deals for flights from Portland to Vietnam that include hotel bookings?
Yes. In addition to deals on Portland to Vietnam flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portland to Vietnam?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Vietnam.
Can I find deals for business class flights from Portland to Vietnam?
Yes. Cheapflights offers flight deals from Portland to Vietnam 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 Vietnam?
Currently, March is the cheapest month in which you can book a flight from Portland, Maine to Vietnam (average of $640). Flying from Portland, Maine to Vietnam in June is currently the most expensive (average of $1,117). 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

Alternative routes for Portland to Vietnam

Boston to Narita flights

Boston to Haneda flights

Boston to Suvarnabhumi flights

Boston to Mumbai flights

Boston to New Delhi flights

Boston to Ho Chi Minh City flights

Boston to Incheon Intl flights

Boston to Taiwan Taoyuan Intl flights

Boston to Hongqiao Intl flights

Boston to Manila flights

Boston to Hong Kong flights

Boston to Pu Dong flights

Boston to Sung Shan flights

Boston to Capital flights

Boston to Beijing Daxing Intl flights

Boston to Bangalore flights

Boston to Hyderabad flights

Boston to Gimpo Intl flights

Boston to Singapore flights

Boston to Ahmedabad flights

Boston to Chennai flights

Boston to Kuala Lumpur Intl flights

Boston to Kathmandu flights

Boston to Denpasar flights

Boston to Kansai Intl flights

Boston to Phuket City flights

Boston to Lahore flights

Boston to Hanoi flights

Boston to Dhaka flights

Boston to Don Mueang Intl flights

Boston to Chitose flights

Boston to Osaka Itami flights

Boston to Islamabad flights

Boston to Cochin flights

Boston to Vientiane flights

Boston to Guangzhou flights

Boston to Malé flights

Boston to Da Nang flights

Boston to Karachi flights

Boston to Soekarno-Hatta Intl flights

Boston to Baku flights

Boston to Chubu Centrair Intl flights

Boston to Colombo flights

Boston to Cebu City flights

Boston to Kobe flights

Boston to Kolkata flights

Boston to Fuzhou flights

Boston to Okinawa flights

Portland to Narita flights

Portland to Haneda flights

Top airline flying from Portland to Vietnam

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$971	Average$1,320	FlexibilityNo cancel fee	On-time69%

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.

Cheap flights from Portland, ME (PWM) to Vietnam

Find cheap flights from Portland to Vietnam with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Portland to Vietnam

Keep the following information in mind while searching for Portland to Vietnam flight deals. Data was last updated December 20, 2025.

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Average price

Cheapflights Insights

Everything you need to know about your flight from Portland to Vietnam

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

Reviews of airlines servicing Vietnam

See what other customers who have flown with United Airlines from Portland to Vietnam have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Portland to Vietnam. 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 Vietnam?

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

How can I find direct flights from Portland to Vietnam?

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

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

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 Portland to Vietnam

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

Top airline flying from Portland to Vietnam

100% Free

Book with Flexibility

Travel Smart