Find cheap flights from Maine to London

Find cheap flights from Maine to London

Round-trip
Economy
Boston (BOS)
London All airports
Wed 6/3
Wed 6/10
Any month
Compare vs. KAYAK |
Search hundreds of travel sites at once for deals on flights to London

Good to know

Low season

February Best time to beat the crowds with an average 6% drop in price.

High season

November Most popular time to fly with an average 17% increase in price.

Average price of a round-trip

$1090 (avg. price over the last 2 weeks)

Good deal for a round-trip

$764 or less

FAQs for booking Maine to London flights

How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?

Book cheap flights from Maine to London (round-trip)

Airports
Origin
Portland
$756
only
$756
Destination
London
$756
only
$756
$936
only
$936
$947
only
$947
Sat, Nov 14
PWM
Portland Airport
LHR
London Heathrow Airport
20h 14m
Sat, Nov 21
LHR
London Heathrow Airport
PWM
Portland Airport
11h 13m
Trip: 8 days
Based on null reviews
Tue, Sep 8
PWM
Portland Airport
LHR
London Heathrow Airport
11h 38m
Wed, Sep 16
LHR
London Heathrow Airport
PWM
Portland Airport
14h 20m
Trip: 9 days
Based on null reviews
Sat, Nov 14
PWM
Portland Airport
LHR
London Heathrow Airport
11h 45m
Sat, Nov 21
LHR
London Heathrow Airport
PWM
Portland Airport
26h 20m
Trip: 8 days
Based on null reviews
Tue, Sep 8
PWM
Portland Airport
LHR
London Heathrow Airport
13h 50m
Wed, Sep 16
LHR
London Heathrow Airport
PWM
Portland Airport
30h 57m
Trip: 9 days
Based on null reviews
Tue, Sep 8
PWM
Portland Airport
LHR
London Heathrow Airport
14h 00m
Wed, Sep 16
LHR
London Heathrow Airport
PWM
Portland Airport
16h 54m
Trip: 9 days
Based on null reviews
Tue, Sep 8
PWM
Portland Airport
LHR
London Heathrow Airport
14h 00m
Wed, Sep 16
LHR
London Heathrow Airport
PWM
Portland Airport
19h 57m
Trip: 9 days
Based on null reviews
Tue, Sep 8
PWM
Portland Airport
LHR
London Heathrow Airport
11h 00m
Wed, Sep 16
LHR
London Heathrow Airport
PWM
Portland Airport
14h 03m
Trip: 9 days
Based on null reviews
Tue, Sep 8
PWM
Portland Airport
LHR
London Heathrow Airport
20h 20m
Wed, Sep 16
LHR
London Heathrow Airport
PWM
Portland Airport
11h 58m
Trip: 9 days
Based on null reviews
Sat, Nov 14
PWM
Portland Airport
LHR
London Heathrow Airport
24h 35m
Sat, Nov 21
LHR
London Heathrow Airport
PWM
Portland Airport
25h 43m
Trip: 8 days
Based on null reviews
Tue, Sep 8
PWM
Portland Airport
LHR
London Heathrow Airport
13h 05m
Wed, Sep 16
LHR
London Heathrow Airport
PWM
Portland Airport
13h 27m
Trip: 9 days
Based on null reviews
Sat, Nov 14
PWM
Portland Airport
LHR
London Heathrow Airport
27h 15m
Sat, Nov 21
LHR
London Heathrow Airport
PWM
Portland Airport
29h 22m
Trip: 8 days
Based on null reviews
Mon, Jun 15
PWM
Portland Airport
LHR
London Heathrow Airport
14h 45m
Mon, Jun 22
LHR
London Heathrow Airport
PWM
Portland Airport
28h 05m
Trip: 8 days
Based on null reviews
Sat, Nov 14
PWM
Portland Airport
LHR
London Heathrow Airport
9h 39m
Sat, Nov 21
LHR
London Heathrow Airport
PWM
Portland Airport
14h 23m
Trip: 8 days
Based on null reviews
Sat, Nov 14
PWM
Portland Airport
LHR
London Heathrow Airport
15h 50m
Sat, Nov 21
LHR
London Heathrow Airport
PWM
Portland Airport
12h 57m
Trip: 8 days
Based on null reviews
Sat, Nov 14
PWM
Portland Airport
LHR
London Heathrow Airport
14h 55m
Sat, Nov 21
LHR
London Heathrow Airport
PWM
Portland Airport
24h 00m
Trip: 8 days
Based on null reviews
Sat, Nov 14
PWM
Portland Airport
LHR
London Heathrow Airport
21h 05m
Sat, Nov 21
LHR
London Heathrow Airport
PWM
Portland Airport
13h 24m
Trip: 8 days
Based on null reviews
Sat, Nov 14
PWM
Portland Airport
LHR
London Heathrow Airport
19h 41m
Sat, Nov 21
LHR
London Heathrow Airport
PWM
Portland Airport
20h 05m
Trip: 8 days
Based on null reviews
Sun, Jul 12
PWM
Portland Airport
LHR
London Heathrow Airport
12h 40m
Sun, Jul 19
LHR
London Heathrow Airport
PWM
Portland Airport
33h 55m
Trip: 8 days
Based on null reviews
Sat, Nov 14
PWM
Portland Airport
LCY
London City
15h 40m
Sat, Nov 21
LCY
London City
PWM
Portland Airport
17h 25m
Trip: 8 days
Based on null reviews
Sun, Jul 12
PWM
Portland Airport
LGW
London Gatwick Airport
15h 40m
Sun, Jul 19
LGW
London Gatwick Airport
PWM
Portland Airport
25h 45m
Trip: 8 days
Based on null reviews

Top airlines flying from Maine to London

Scores according to KAYAK customer reviews

8.0
Delta
Overall score based on 28,363 reviews
8.2
Boarding
7.8
Comfort
8.5
Crew
7.8
Entertainment
7.5
Food
Airline reviews
Read more about Delta
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Here's why:

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At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

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