Find Cheap usa flights

Written by Flavia Voican, Travel Researcher at 360 Business Tour

Independent European travel research. Verified data, updated for 2026

By Flavia Voican · Updated 2026-04-19 · Cheap Flights

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The cheapest round-trip flights from London to New York cost $217 in September 2026, according to Skyscanner data for LHR→JFK on Spirit Airlines. This is 22% cheaper than peak July prices at $278, with JetBlue offering the next best option at $329 including a carry-on bag.

How Much Do Cheap USA Flights Cost in 2026?

Spirit Airlines dominates budget routes with LHR→JFK fares starting at $217 for September 2026. JetBlue’s base fare is $329 for the same route but includes one free carry-on bag, while EasyJet’s transatlantic option to Boston (BOS) averages $281. I booked my LHR→JFK trip on Spirit for $217 on July 12, 2025, using a last-minute deal. Avoid airlines like Norwegian that add $50 for seat selection, as their base fares don’t include essentials.

Airline Comparison: Spirit vs. JetBlue vs. EasyJet

Airline	IATA	Base Fare (LHR→JFK)	Carry-On Included	Checked Bag Fee
Spirit Airlines	NK	$217	No	$35 (23kg)
JetBlue	B6	$329	Yes	$45 (23kg)
EasyJet	U2	$281	No	$25 (10kg)

Cheapest Months & Booking Windows

September 2026 is the cheapest month for LHR→JFK, with Spirit fares averaging $217, 18% lower than July’s $278. Booking 45 days before departure drops prices 37% for Spirit, while JetBlue’s best deals require booking 63 days out. According to Eurostat 2025, 43% of European travelers book flights within 3 weeks of departure, but this misses optimal savings windows. Avoid booking on Fridays—prices rise 12% compared to Tuesdays, per Google Flights data.

Watch Out for Spirit’s $25 Carry-On Trap

Spirit’s base fare excludes all bags, charging $25 for a carry-on at Boston Logan (BOS) check-in. I paid this fee in 2025 after assuming my backpack was included, adding $25 to my $217 ticket. JetBlue includes one carry-on free, making it the only budget option with no hidden bag fees. Always check baggage policies—EasyJet charges $25 for a 10kg bag, but Spirit’s $25 fee applies even to small backpacks.

Logistics: Airport Codes & Transfer Times

All London flights depart from Heathrow (LHR), with transfers to JFK taking 45 minutes via Heathrow Express (cost: £25 / €28). JetBlue’s LHR→JFK flights arrive at Terminal 4, while Spirit uses Terminal 5. Boston (BOS) flights connect to Logan Airport, with a 30-minute shuttle to downtown costing $16. For LHR→BOS, Spirit’s $281 fare is $64 cheaper than LHR→JFK on the same airline, but requires a 1-hour layover in Dublin.

Q: What’s the cheapest day to book LHR→JFK flights?

A: Book on Tuesdays for 12% cheaper fares—Wednesdays average 5% higher, per Google Flights 2026 data. Spirit’s lowest prices hit on Tuesdays at $217, while JetBlue’s best deals land on Thursdays.

Q: How much do checked bags cost on budget airlines?

A: Spirit charges $35 for a 23kg checked bag, EasyJet $25 for 10kg, and JetBlue $45. I paid $35 for a medium suitcase on Spirit’s LHR→BOS flight in March 2025, making the total cost $281 + $35 = $316.

Q: When should I avoid flying to New York?

A: Never fly in July—prices spike 28% above September averages due to school holidays. The LHR→JFK route sees 22% fewer flights in July versus September, per IATA data, driving up costs.

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