Cheap flights from London to Portland

November is the cheapest month on this route, and it usually undercuts the summer rush by a wide margin. The price calendar runs from September through July, so you can compare early autumn, winter, spring and midsummer side by side. Late autumn and the first half of winter are quiet across the Atlantic, while the summer school holidays push fares up. Midweek departures tend to be lighter than Friday or Sunday, when weekend traffic builds. If your dates are flexible, avoid the days around Thanksgiving and Christmas, and book well ahead for summer travel.

No airline flies this route nonstop, so every itinerary pairs a transatlantic carrier with a European or American connection. Lufthansa, Swiss, Air France, Finnair, KLM Cityhopper and United Airlines sell through-tickets, which usually means your bags are checked to Portland and a missed connection becomes the airline's problem. Regional names such as Lufthansa City Airlines, Helvetic Airways, Edelweiss Air and Republic Airways mostly turn up on the shorter legs. None of these are low-cost carriers, so a checked bag and a meal are normally part of the fare, but the leanest transatlantic tickets can still exclude seat selection, so read the rules before you pay.

Portland International is the only airport serving the city, so there is no second arrival point to weigh up. It sits close to downtown by American standards, and the usual options — light rail, taxi or rideshare — will get you into the centre without much fuss. If your itinerary connects through another American city, you clear immigration and customs at that first point of entry, then recheck your bags for the final hop. Allow a longer buffer on the way home, since the international leg back to London needs more time than a domestic departure.

Currency

USD ($)

Power sockets

Type A, B · 120 V

Language

Samoan, Hawaiian, Chamorro, Carolinian, Spanish

Emergency number

911

Driving side

right

Calling code

+1

Internet domain

.us

Population of Portland

653 k (2020)

Time zone

UTC-07 (America/Los_Angeles)

Country facts: Wikidata

• Check which London airport your flight leaves from — Heathrow, Gatwick, City, Luton and Stansted are not interchangeable.
• Confirm whether your bags are checked through to Portland or only to the connecting hub.
• Keep both legs on one ticket; separate bookings leave a missed connection to you, not the airline.
• Sort your US entry paperwork before booking, since you cannot board without an approved authorisation.
• Look at the price calendar first: November is the cheapest month, summer is not.
• Read the fare rules for seat selection and checked baggage, which the leanest transatlantic fares often exclude.