$384 Cheap Aer Lingus flights Boston (BOS) to London (LHR)

You’ll discover budget-friendly return Aer Lingus flights from $588 from BOS to LHR by sorting your results from “Price (lowest to highest)” on Expedia. Or search for deals from $384 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Look for one-way or return flights to London in January or February. You could find a cheap fare with Aer Lingus during these off-peak times.

Look for Aer Lingus flights from BOS to LHR about one month before you want to leave. The cheapest time to book an international flight is generally 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. Regardless of ticket type or itinerary, the best day to book international airfare is usually Sunday. Friday is often the most expensive. Travelers who book on a Sunday can save 17% on average compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Click on the “Nonstop” filter when looking for direct Aer Lingus flights from BOS to LHR. It’s also a good way to compare other carriers servicing the same direct route.

Search Aer Lingus’s earliest flights from BOS to LHR by checking our “Morning” and “Early Morning” filters. Not only will you get to where you’re going sooner, early departures are also 20% less likely to be canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Heathrow Airport (LHR) is the primary London gateway for Aer Lingus flights from Logan Intl. Airport (BOS).

For checked luggage, you can bring 1 checked-in bag weighing up to 50 lb with dimensions not exceeding 62 inches. You can also travel with 1 cabin bag on board when flying standard economy from BOS to LHR with Aer Lingus. This carry-on should weigh less than 22 lb and be no larger than 21 inches x 15 inches x 9 inches. Going above these restrictions can mean additional fees, so check Aer Lingus’s baggage allowance guidelines before you start packing.

Heading from BOS to LHR with Aer Lingus comes with a host of benefits, including a rewarding loyalty program and a 4-star airline rating. Plus, when booking through Expedia, One Key™ members can earn OneKeyCash™* to redeem on select future travel purchases. That’s in addition to the Aer Lingus AerClub points you can earn with Aer Lingus.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Aer Lingus typically flies Boeing 787-10 planes for flights from Logan Intl. Airport (BOS) to Heathrow Airport (LHR). This carrier also operates the Boeing 787-9 on this route. Bear in mind that aircraft type can vary depending on operational reasons, so the plane you board could be different on the day.

Changes are often free within 24 hours of making a booking, but your airline may charge you after that time. For more information about altering your reservation, go to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to change your itinerary without extra charges, tick the “Changes included” and “No cancel fee” filters when planning your next getaway.