The cheapest times to fly from ACK to LHR are

  • January 1st to April 1st
  • July 9th to July 29th
  • November 5th to December 9th (except the week of November 19th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from ACK to LHR is late January. Prices can be as high as $1874 for Saturday flights during early to mid August, or as low as $766 for Tuesday flights around late January.


When to Fly to London

Flying from Nantucket, MA (ACK) to London (LHR) will usually cost between $782 to $1487 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $778. Due to high demand the most expensive time to fly is early to mid August, with an average price of $1491. Planning your trip to low-cost times can easily save you $713 on economy flights and even more on first-class flights. Generally, any price below $990 can be considered a good price for a round-trip ACK to LHR flight.

See below for a graph of average weekly prices for the ACK to LHR route. All prices are for round-trip tickets in USD.

ACK to LHR Flight Prices

Compared to other flights, the ACK to LHR flight is priced close to the average and costs less than the average flight leaving from Nantucket. The average price per mile (for a direct flight) is $0.19, which is below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to LHR, and Wednesday the cheapest day to fly back into ACK. Saturdays are the most expensive days to fly to London, and Sundays are the most expensive days to return to Nantucket. Selecting flights on the least expensive days could save you up to $268 (14%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $921. Return trip prices are from the LHR to ACK flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from ACK to LHR can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 6 hour 51 minutes may not be realistic.


Flight Hacking ACK to LHR

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from ACK to LHR — but Champion Traveler does!

Hack #1: Boston, MA (ACK > BOS > LHR)

  • Price for both tickets: $765
  • Average savings: $225 (22.69%)

See ACK to BOS flights

Hack #2: New York, NY (ACK > JFK > LHR)

  • Price for both tickets: $887
  • Average savings: $103 (10.41%)

See ACK to JFK flights


Flight Questions Answered

Still have questions about flying from ACK to LHR? We’ve got answers.

Which airlines fly this route?

You can find 2 major airlines flying this route most often: American, Delta, and potentially more during busy seasons.

How far away is it from London Heathrow Airport to Nantucket Memorial Airport?

The distance between the two airports is roughly 3263 miles or 5251 kilometers.

How long does it take to fly from ACK to LHR?

The real-world flight time for a nonstop ACK to LHR flight is about 6 hour 51 minutes.

How many flights go between Nantucket, MA and London?

It depends on the day of the week and the date, but a typical day might have around 23 available flights from ACK to LHR.


Airport Location Info


Departing Airport

Origination code ACK
Origination airport name Nantucket Memorial Airport
City Nantucket, MA
Country the United States
Latitude 41.3
Longitude -70.1

Return Airport

Destination code LHR
Destination airport name London Heathrow Airport
City London
Country the United Kingdom
Latitude 51.5
Longitude -0.5


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.