How does KAYAK find such low prices on flights from Maine to London Heathrow Airport?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Maine to London Heathrow Airport.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Maine to London Heathrow Airport?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from Maine is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Maine to London Heathrow Airport?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London Heathrow Airport with an airline and back to Maine with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Maine to London Heathrow Airport?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from Maine up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$301 CHEAP FLIGHTS from Maine to London Heathrow (LHR)

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Cheap Flights from Maine to London

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Maine to London

Tue, Nov 10 - Thu, Nov 12

9:46 am - 10:50 amPWM Portland-LHR London Heathrow

20h 04m1 stop Washington, D.C. Dulles Intl

9:00 am - 11:21 pmLHR London Heathrow-PWM Portland

19h 21m2 stops Zurich Newark

$767United Airlines

Mon, Nov 16 - Wed, Nov 18

8:49 am - 9:10 amPWM Portland-LHR London Heathrow

19h 21m1 stop Newark

6:50 am - 11:21 pmLHR London Heathrow-PWM Portland

21h 31m2 stops Brussels Bruxelles-National Newark

$771United Airlines

Mon, Nov 16 - Wed, Nov 18

3:41 pm - 4:20 pmPWM Portland-LHR London Heathrow

19h 39m2 stops Newark Zurich

9:00 am - 11:21 pmLHR London Heathrow-PWM Portland

43h 21m2 stops Halifax Intl Newark

$771United Airlines

Mon, Nov 16 - Wed, Nov 18

8:49 am - 9:10 amPWM Portland-LHR London Heathrow

19h 21m1 stop Newark

6:50 am - 11:21 pmLHR London Heathrow-PWM Portland

21h 31m2 stops Brussels Bruxelles-National Newark

$772United Airlines

Thu, Nov 12 - Wed, Nov 18

6:30 am - 9:40 pmPWM Portland-LHR London Heathrow

10h 10m1 stop New York John F Kennedy Intl

7:25 am - 11:43 pmLHR London Heathrow-PWM Portland

21h 18m1 stop New York John F Kennedy Intl

$775JetBlue

Tue, Nov 10 - Thu, Nov 12

9:46 am - 7:10 amPWM Portland-LHR London Heathrow

16h 24m2 stops Washington, D.C. Dulles Intl Montreal Pierre Elliott Trudeau Intl

6:00 am - 11:21 pmLHR London Heathrow-PWM Portland

22h 21m3 stops Zurich Toronto Pearson Intl Newark

$778Multiple Airlines

Tue, Nov 10 - Thu, Nov 12

8:49 am - 7:10 amPWM Portland-LHR London Heathrow

17h 21m3 stops Newark Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

6:00 am - 11:21 pmLHR London Heathrow-PWM Portland

22h 21m3 stops Zurich Toronto Pearson Intl Newark

$786Air Canada

Thu, Nov 12 - Tue, Nov 17

3:45 pm - 10:30 amBGR Bangor-LHR London Heathrow

13h 45m1 stop New York John F Kennedy Intl

5:05 pm - 3:05 pmLHR London Heathrow-BGR Bangor

27h 00m2 stops Amsterdam Schiphol New York John F Kennedy Intl

$875KLM

Thu, Nov 12 - Wed, Nov 18

6:00 am - 7:50 amBGR Bangor-LHR London Heathrow

20h 50m1 stop Philadelphia

10:35 am - 5:30 pmLHR London Heathrow-BGR Bangor

11h 55m1 stop Philadelphia

$905American Airlines

Tue, Nov 24 - Tue, Dec 1

6:00 am - 6:35 amBGR Bangor-LHR London Heathrow

19h 35m1 stop Philadelphia

10:35 am - 11:18 pmLHR London Heathrow-BGR Bangor

17h 43m1 stop Philadelphia

$941American Airlines

Recent last minute flight deals from Maine to London

Thu, Nov 5 - Wed, Nov 18

6:30 am - 9:40 pmPWM Portland-LHR London Heathrow

10h 10m1 stop New York John F Kennedy Intl

7:25 am - 11:43 pmLHR London Heathrow-PWM Portland

21h 18m1 stop New York John F Kennedy Intl

$847JetBlue

Wed, Nov 4 - Sun, Nov 15

2:05 pm - 6:40 amPWM Portland-LHR London Heathrow

11h 35m1 stop Washington, D.C. Dulles Intl

9:00 am - 11:21 pmLHR London Heathrow-PWM Portland

19h 21m2 stops Zurich Newark

$874United Airlines

Thu, Nov 5 - Wed, Nov 18

12:42 pm - 7:45 amPWM Portland-LHR London Heathrow

14h 03m1 stop Detroit Metropolitan Wayne County

8:40 am - 11:31 pmLHR London Heathrow-PWM Portland

19h 51m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$876Delta

Wed, Nov 4 - Sun, Nov 15

8:49 am - 7:10 amPWM Portland-LHR London Heathrow

17h 21m2 stops Newark Montreal Pierre Elliott Trudeau Intl

9:00 am - 11:21 pmLHR London Heathrow-PWM Portland

19h 21m2 stops Zurich Newark

$877United Airlines

Thu, Nov 5 - Wed, Nov 18

4:15 pm - 10:30 amPWM Portland-LHR London Heathrow

13h 15m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

8:40 am - 11:31 pmLHR London Heathrow-PWM Portland

19h 51m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$881Delta

Wed, Nov 4 - Sun, Nov 15

12:42 pm - 7:45 amPWM Portland-LHR London Heathrow

14h 03m1 stop Detroit Metropolitan Wayne County

4:35 pm - 12:19 amLHR London Heathrow-PWM Portland

12h 44m1 stop New York John F Kennedy Intl

$905Delta

Thu, Nov 5 - Sun, Nov 15

11:07 am - 6:35 amPWM Portland-LHR London Heathrow

14h 28m1 stop Philadelphia

3:40 pm - 11:53 amLHR London Heathrow-PWM Portland

25h 13m1 stop Chicago O'Hare Intl

$919Multiple Airlines

Wed, Nov 4 - Fri, Nov 6

6:01 am - 7:50 amPWM Portland-LHR London Heathrow

20h 49m1 stop Atlanta Hartsfield-Jackson

6:20 am - 9:00 pmLHR London Heathrow-PWM Portland

19h 40m2 stops Paris Charles de Gaulle Atlanta Hartsfield-Jackson

$1,016Virgin Atlantic

Wed, Nov 4 - Fri, Nov 6

12:42 pm - 10:30 amPWM Portland-LHR London Heathrow

16h 48m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle

11:45 am - 12:10 amLHR London Heathrow-PWM Portland

17h 25m2 stops Amsterdam Schiphol New York John F Kennedy Intl

$1,033Delta

Wed, Nov 4 - Fri, Nov 6

12:42 pm - 7:45 amPWM Portland-LHR London Heathrow

14h 03m1 stop Detroit Metropolitan Wayne County

4:35 pm - 12:10 amLHR London Heathrow-PWM Portland

12h 35m1 stop New York John F Kennedy Intl

$1,058KLM

Useful Info

Low season	January
High season	July
Cheapest flight	$301

Best time to beat the crowds with an average 23% drop in price.

Most popular time to fly with an average 21% increase in price.

Flight from Portland to London Heathrow Airport

How does KAYAK find such low prices on flights from Maine to London Heathrow Airport?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Maine to London Heathrow Airport.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Maine to London Heathrow Airport?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from Maine is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Maine to London Heathrow Airport?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London Heathrow Airport with an airline and back to Maine with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Maine to London Heathrow Airport?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from Maine up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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Richmond

Slough

Wembley

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Luton

Eastbourne

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Swindon

Kingston upon Thames

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Watford

Harrow

Twickenham

Ipswich

Moreton-in-Marsh

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$301 Find Cheap Flights from Maine to London Heathrow Airport - Compare and Save

Cheap Flights from Maine to London

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