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What is the typical price of a round-trip flight between Portland and London Heathrow Airport? What is the cheapest month to fly to London Heathrow Airport? The month of October is, on average, the cheapest month to fly to London Heathrow Airport from Portland, with most prices found around $681. If you’re not able to fly to London Heathrow Airport in October, then April is your next best option. Flight prices from Portland to London Heathrow Airport during April average around $690.What is the cheapest day to depart on your flight to London Heathrow Airport? Our data shows that Sunday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $858. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $1,038.What is the cheapest time of day to depart on your flight to London Heathrow Airport? According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Portland to London Heathrow Airport in the afternoon for as low as $807. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $938.What is the cheapest Portland to London Heathrow flight route? Fly from Portland to London Heathrow for the best Portland - London Heathrow flight pricesHow far in advance should I book a flight to London Heathrow Airport? You are more likely to see cheaper flights to London Heathrow Airport from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $835 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Portland for as low as $765 on momondo.What cabin class options are available on Portland to London Heathrow flights? There are 4 cabin classes available to choose from on Portland to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.Can stopping save me money on Portland to London Heathrow Airport flights? You could potentially save up to 4% on your flight if you consider stops on a Portland to London Heathrow Airport flight.How have Portland to London Heathrow Airport flight prices changed over time? As of November 2025, prices for Portland to London Heathrow Airport flights are approximately 42% cheaper when compared to flights at the same time last year. (责任编辑：) |