The cheapest way to fly London to New York

Step 1: stop searching LHR → JFK

About 70% of leisure travelers default to Heathrow → JFK because it's the headline pair on every search engine. It's also rarely the cheapest. With five London airports (LHR, LGW, STN, LTN, LCY) and three New York airports (JFK, EWR, LGA) you have 15 distinct city pairs to test. Each has its own fare distribution. Gatwick into Newark on Norse Atlantic or United frequently undercuts Heathrow into JFK by $150–$250 round trip on the same calendar week.

Step 2: test stopover hubs

Direct flights aren't always cheapest, especially in premium economy. Three stopover hubs reliably beat the direct fare on this corridor:

• Reykjavík (KEF) on Icelandair. Splits the Atlantic into two cheaper segments and gives you a free multi-day stopover at no extra fare.
• Dublin (DUB) on Aer Lingus. Includes US Pre-Clearance, which means you clear US immigration in Dublin and land at JFK as a domestic arrival. Frequently the cheapest premium-economy option.
• Lisbon (LIS) on TAP. TAP's stopover program lets you spend up to 10 nights in Lisbon at no fare premium.

Step 3: shift one weekday inside your window

Airline revenue management resets fare buckets midweek. On recent tests, shifting outbound from Friday to Tuesday inside a ±3 day window flipped fare class on about 40% of London → NYC searches — saving anywhere from $80 to $200 round trip on the same itinerary. If you have a flexible window, never search a single date.

Step 4: consider open-jaw

If you're spending a few days in the UK either side of the trip, an open-jaw can be cheaper than a round trip. Common pattern: outbound LGW → EWR, return JFK → LHR. Different airports on the outbound and return lets the optimizer pick the cheapest segment in each direction independently — often a meaningful saving in premium economy and business class.

Step 5: book in the right order

For one-ticket itineraries this doesn't matter. For multi-ticket strategies — say, a low-cost transatlantic out and a flexible-rules ticket back — booking order matters because the return is the leg you're most likely to need to change. Always book the rigid, non-refundable leg first and the flexible one last.

Cheapest months historically

January, February, and the first half of September are reliably the cheapest months on this corridor. Avoid the last two weeks of December and the first week of August unless you have to travel then — those weeks regularly cost 2–3× the off-peak fare for the same routing.

What SnagRid does on this corridor

SnagRid tests the full combinatorial space — 15 city pairs × stopover options × weekday shifts × open-jaw permutations — and surfaces the top five with the exact booking order. You can see the live route guide or run a free preview on your dates.