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

Our cheapest airline available from Glasgow to Portland, Maine is KLM. Our recent data shows that you can find tickets from as low as £582 on this airline.

In terms of precipitation, rainfall in Portland, Maine ranges from 73.0 - 115.0 inches per month. November is typically the wettest month, when rainfall can reach 115.0 mm. August is typically the driest time to visit Portland, Maine when rainfall is around 73.0 mm.

If weather is an important factor for your trip to Portland, Maine, 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 20.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Glasgow to Portland, Maine as you normally would.

What airport do you fly into for flights to Portland from Glasgow?

Located just 2.9 mi from the city center, Portland is the airport most travelers will use when flying to Portland from Glasgow. Booking flights from Glasgow to Portland (PWM) should be relatively easy as there are 0 daily inbound flights from Glasgow from 2 different airlines.

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

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

How can I find direct flights from Glasgow to Portland?

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

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

Yes. Cheapflights offers flight deals from Glasgow to Portland 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 Glasgow to Portland, Maine

Best time to book a flight from Glasgow to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Glasgow with our price prediction graph.

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.

Reviews of airlines servicing Portland

Read through reviews of airlines operating flights from Glasgow to Portland, such as KLM. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

KLM

7.8

Good

1,385 reviews

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Related info for your journey

What airport do you fly into for flights to Portland from Glasgow?
Located just 2.9 mi from the city center, Portland is the airport most travelers will use when flying to Portland from Glasgow. Booking flights from Glasgow to Portland (PWM) should be relatively easy as there are 0 daily inbound flights from Glasgow from 2 different airlines.
What is the cheapest airline to fly from Glasgow to Portland, Maine round-trip?
Our cheapest airline available from Glasgow to Portland, Maine is KLM. Our recent data shows that you can find tickets from as low as £582 on this airline.
Can I find deals for flights from Glasgow to Portland that include hotel bookings?
Yes. In addition to deals on Glasgow to Portland flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Glasgow to Portland?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Glasgow to Portland.
Can I find deals for business class flights from Glasgow to Portland?
Yes. Cheapflights offers flight deals from Glasgow to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Top 2 airlines flying from Glasgow to Portland

Airline	Cheapest	Average	Flexibility	On-time
KLM	Cheapest£571	Average£748	FlexibilityNo cancel fee	On-time75%	Search KLM flights
United Airlines	Cheapest£632	Average£887	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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How does Cheapflights help users find flights from Glasgow to Portland?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Portland from Glasgow today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Glasgow to Portland?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Portland from Glasgow.

Can Cheapflights find flights from Glasgow to Portland with no change fees?

Need flexible booking options for your flight to Portland from Glasgow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Glasgow to Portland become cheaper?

Of course! You can now track prices for flights from Glasgow to Portland and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Best time to book a flight from Glasgow to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Glasgow with our price prediction graph.

Reviews of airlines servicing Portland

Read through reviews of airlines operating flights from Glasgow to Portland, such as KLM. 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 Glasgow to Portland. 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 into for flights to Portland from Glasgow?

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

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

How can I find direct flights from Glasgow to Portland?

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

Travelling to a place near Portland?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Glasgow to Portland

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

Complete your trip

Complete your trip to Portland by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from Glasgow to Portland by cabin class

Find flights from Glasgow to Portland, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Glasgow and Portland flights

Browse other Glasgow and Portland flight options. Last updated on 14 September 2025.

Popular flight searches

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Top 2 airlines flying from Glasgow to Portland

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Glasgow to Portland?

Why should you use Cheapflights to find cheap flight tickets from Glasgow to Portland?

Can Cheapflights find flights from Glasgow to Portland with no change fees?

Can Cheapflights notify me if prices for flights from Glasgow to Portland become cheaper?

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Book with Flexibility

Travel Smart

Cheap flights from Glasgow to Portland, Maine

Best time to book a flight from Glasgow to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Glasgow with our price prediction graph.

Reviews of airlines servicing Portland

Read through reviews of airlines operating flights from Glasgow to Portland, such as KLM. 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 Glasgow to Portland. 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 into for flights to Portland from Glasgow?

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

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

How can I find direct flights from Glasgow to Portland?

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

Travelling to a place near Portland?

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 Glasgow to Portland

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

Top 2 airlines flying from Glasgow to Portland

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Glasgow to Portland?

Why should you use Cheapflights to find cheap flight tickets from Glasgow to Portland?

Can Cheapflights find flights from Glasgow to Portland with no change fees?

Can Cheapflights notify me if prices for flights from Glasgow to Portland become cheaper?

100% Free

Book with Flexibility

Travel Smart