The cheapest times to fly from LCY to BOI are

  • January 8th to March 25th
  • April 23rd to May 20th
  • September 24th to December 9th

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 LCY to BOI is mid October. Prices can be as high as $1695 for Saturday flights during early August, or as low as $773 for Tuesday flights around mid October.


When to Fly to Boise

Flying from London (LCY) to Boise, ID (BOI) will usually cost between $863 to $1411 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid October with an average ticket price of $885. Due to high demand the most expensive time to fly is early August, with an average price of $1475. Planning your trip to low-cost times can easily save you $590 on economy flights and even more on first-class flights. Generally, any price below $992 can be considered a good price for a round-trip LCY to BOI flight.

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

LCY to BOI Flight Prices

Compared to other flights, the LCY to BOI flight is priced close to the average and costs slightly more than the average flight leaving from London. The average price per mile (for a direct flight) is $0.13, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to BOI, and Monday the cheapest day to fly back into LCY. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $126 (11%) 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 $991. Return trip prices are from the BOI to LCY 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 LCY to BOI can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 9 hour 42 minutes may not be realistic.


Flight Hacking LCY to BOI

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 LCY to BOI — but Champion Traveler does!

Hack #1: Seattle, WA (LCY > SEA > BOI)

  • Price for both tickets: $672
  • Average savings: $320 (32.26%)

See LCY to LAX flights

Hack #2: Los Angeles, CA (LCY > LAX > BOI)

  • Price for both tickets: $677
  • Average savings: $316 (31.8%)

See LCY to SEA flights

Hack #3: San Jose, CA (LCY > SJC > BOI)

  • Price for both tickets: $718
  • Average savings: $274 (27.62%)

See LCY to SJC flights


Flight Questions Answered

Still have questions about flying from LCY to BOI? We’ve got answers.

Which airlines fly this route?

You can find 16 major airlines flying this route most often: Aer Lingus, Air Canada, Alaska, American, British Airways, Brussels Airlines, Delta, Finnair, Iberia, KLM, LOT, Lufthansa, Luxair, SWISS, United, Virgin Atlantic, and potentially more during busy seasons.

How far away is it from Boise Air Terminal Airport to London City Airport?

The distance between the two airports is roughly 4845 miles or 7797 kilometers.

How long does it take to fly from LCY to BOI?

The real-world flight time for a nonstop LCY to BOI flight is about 9 hour 42 minutes.

How many flights go between London and Boise, ID?

It depends on the day of the week and the date, but a typical day might have around 63 available flights from LCY to BOI.


Airport Location Info


Departing Airport

Origination codeLCY
Origination airport nameLondon City Airport
Countrythe United Kingdom

Return Airport

Destination codeBOI
Destination airport nameBoise Air Terminal Airport
CityBoise, ID
Countrythe United States


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.