Cheap Flights from Portland, Maine to London
No deal from Portland, Maine to London has cleared our price bar yet. What we have seen on the route is below.
Across 3 months of observations from Portland, Maine to London, the lowest round-trip fare we recorded was $818, in September. The typical fare was $855. September was the cheapest month we saw and August the dearest.
The most recent price we saw on this route was $833 on JetBlue, seen Oct 31. It is an unverified observation and may have changed.
See every deal from Portland, Maine, to London, or the return direction London to Portland, Maine.
Latest price we saw: Portland, Maine to London
The most recent round-trip fare our sweep found on this route. It is not verified and may have changed since the date shown.
| From | Price | Per mile | Travel dates | Airline | Seen | Check price |
|---|---|---|---|---|---|---|
| Portland, Maine (PWM) to London (LHR) | $833 | 13.1¢ | Nov 7 – Nov 13 | JetBlue | Oct 31 | Check price |
Price history: Portland, Maine to London
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $833 | $833 | 3 |
| Sep 2026 | $818 | $818 | 57 |
| Aug 2026 | $915 | $915 | 79 |
Frequently asked questions
How many flight deals from Portland, Maine to London are on Sparkflights right now?
There are 0 verified deals from Portland, Maine to London on the board right now. The list refreshes hourly.
What is the lowest price ever seen from Portland, Maine to London?
The lowest fare we've recorded from Portland, Maine to London is $818, based on 139 price observations over 3 months.
How much does a flight from Portland, Maine to London cost?
The typical round-trip fare we observed from Portland, Maine to London is $855, against a recorded low of $818. These are observations, not quotes.
When is the cheapest month to fly Portland, Maine to London?
September was the cheapest month we observed from Portland, Maine to London and August the dearest, over 3 months of data.
What is the current price from Portland, Maine to London?
The most recent fare our sweep saw from Portland, Maine to London is $833, on Oct 31. It is an unverified observation rather than a verified deal, so check it before booking.