Cheap flights from Portland (PWM) to London (LON) from $539

Leaving on a Sunday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 64% on the overall cost on flights from Portland, Maine to London.

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 53 days in advance, which can save you up to 118% on flights from Portland, Maine to London compared to booking the week you need them. Waiting 53 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $1,271. For sooner than that we have options available in the next 3 days from $2,081.

February is one of the best times of the year to fly to London from Portland, Maine. Prices for February average $965 per person but you can even find prices for as low as $693. The most expensive prices can be found in the month of July. Opting for a February flight can save you 74% on your journey compared to booking in July

Unlike at noon, when flights are generally more expensive, you can save up to 7% on flights from Portland, Maine to London by exploring options for tickets in the morning.

Portland (PWM) is the airport you will fly out of if you book a flight from Portland to London. You should not have trouble finding flights to London from Portland; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Portland airport to London. It is only a 2.9 mi journey to Portland (PWM) from Portland’s city center.

Some of the carriers operating flights from Portland to London that may be offering flexible cancellation policies are Delta, United Airlines, and American Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

Yes, there are multiple flights from Portland, Maine to London for under $800. The cheapest flight booked recently is on Delta for just $716, but on average you can expect to pay $874.

Flying on Delta is currently your cheapest option to London, with prices starting at $716. Additional round-trip tickets that might be worth considering are offered by American Airlines and United Airlines, with the lowest prices starting at $726 and $740, respectively. Delta is 25% cheaper than the average price of flights available within the next 90 days to this destination.

To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at $539. United Airlines flights start at $636 while deals on TAP AIR PORTUGAL start at $1,084 one-way.

Most travelers choose Portland - London Heathrow, Portland - London Gatwick or Portland - London City when deciding on the best route from Portland, Maine to London.

American Airlines, Delta and United Airlines are the most popular airlines when flying from Portland, Maine to London.

This is defined as Portland Airport (PWM) and London Heathrow Airport (LHR). Codes like London Heathrow Airport are often used to just call airports uniquely. While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: London Gatwick Airport (LGW), London Stansted Airport (STN), London City Airport (LCY), London Luton Airport (LTN), London Southend Airport (SEN).