International route
Cheap flights from London to Philadelphia
London Heathrow Airport (LHR) to Philadelphia International Airport (PHL). 3,536 miles, 7h 35m nonstop.
LHR to PHL at a glance
Computed from airline schedules and the fares we track for this route. Refreshed several times a day.
- Distance
- 3,536 milesgreat-circle
- Typical flight time
- 7h 35mnonstop, gate to gate
- Nonstop airlines
- AABA2 airlinesAmerican, British Airways
- Nonstop flights per day
- 2all airlines combined
- Cheapest month
- January 2027over the next six months
- Best day to fly
- Wednesday21% less than Friday
- Time difference
- 5h behindPhiladelphia vs London
London to Philadelphia
Round trips from $339
Per traveler, taxes and fees included. Lowest fare we found departs Tue, Jan 5.
Cheapest month: January 2027
See fares on these datesLock any fare free — pay only when you accept your last-minute deal
Or ask an agent on WhatsAppLondon to Philadelphia fares by month
Lowest round-trip economy fare per traveler in each of the next six months, taxes and fees included. Select a month to search that date.
Airlines flying London to Philadelphia
2 airlines fly nonstop with 2 departures a day combined, plus 12 more with one stop.
- AAAmerican AirlinesoneworldNonstop · 1 flight a day · first checked bag from $40
- BABritish AirwaysoneworldNonstop · 1 flight a day · first checked bag from $75
- EIAer LingusConnecting via DUB, SNN · first checked bag from $70
- ACAir CanadaStar AllianceConnecting via YUL · first checked bag from $35
- OSAustrian AirlinesStar AllianceConnecting via VIE · first checked bag from $75
- DLDelta Air LinesSkyTeamConnecting via ATL, MSP, DTW, BOS, LGA · first checked bag from $35
- IBIberiaoneworldConnecting via MAD · first checked bag from $70
- B6JetBlueConnecting via BOS, MCO · first checked bag from $40
- KLKLM Royal Dutch AirlinesSkyTeamConnecting via AMS · first checked bag from $75
- NONorse Atlantic AirwaysLow-costConnecting via OSL · first checked bag from $80
- LXSWISSStar AllianceConnecting via ZRH, GVA · first checked bag from $75
- TPTAP Air PortugalStar AllianceConnecting via LIS · first checked bag from $70
- UAUnited AirlinesStar AllianceConnecting via ORD, IAD · first checked bag from $40
- WSWestJetConnecting via YYZ · first checked bag from $35
Connecting options
Hubs where one airline can carry you on both legs, most choices first.
- Boston (BOS)DLB62 airlines
- Atlanta (ATL)DL1 airline
- Minneapolis (MSP)DL1 airline
- Detroit (DTW)DL1 airline
- New York (LGA)DL1 airline
Which airport should I use?
London has 3 airports. Fares can differ by $50 to $150 round trip between them, so check the alternatives before you book.
Tips for this route
- Only American and British fly this route nonstop, which keeps nonstop fares firm. A one-stop itinerary through BOS or ATL is usually cheaper if you can spare the extra three to five hours.
- January 2027 is the cheapest month to fly over the next six months, with round trips from $339; September 2026 is the most expensive at $461 and up, a difference of $122 per traveler.
- Departing on a Wednesday averages 21% less than a Friday on this route. If your dates are flexible, shift the outbound by a day or two and check the calendar view before you book.
- Book 6 to 12 weeks ahead; fares climb in the last three weeks and around holidays.
- Philadelphia is 5 hours behind London. A morning departure lands in Philadelphia with most of the day left; an evening flight arrives close to local dinner time.
Ready to compare live fares?
See every airline on LHR–PHL side by side with bags and seat rules spelled out.
Search London to PhiladelphiaLondon to Philadelphia: common questions
How long is the flight from London to Philadelphia?
A nonstop flight from London (LHR) to Philadelphia (PHL) takes about 7h 35m gate to gate, covering 3,536 miles. Connecting itineraries add the layover, typically 2 to 5 hours more in total.
Which airlines fly nonstop from LHR to PHL?
American Airlines and British Airways operate nonstop flights from London (LHR) to Philadelphia (PHL), with 2 nonstop departures a day between them. One-stop options connect through BOS, ATL and MSP.
What is the cheapest month to fly from London to Philadelphia?
Over the next six months, January 2027 has the lowest round-trip fares from London (LHR) to Philadelphia (PHL), starting at $339 per traveler including taxes and fees. Within any month, Wednesday departures average the lowest prices.
How far in advance should I book London to Philadelphia flights?
Book 6 to 12 weeks ahead; fares climb in the last three weeks and around holidays. Air1 Tickets includes free cancellation within 24 hours of booking on every fare, so you can lock in a good price and keep looking.
What is the time difference between London and Philadelphia?
Philadelphia is 5 hours behind London. LHR is on Europe/London time and PHL on America/New York time. Departure and arrival times in search results are always shown in local time at each airport.
Related routes
Other popular city pairs from the same departure city and to the same destination, with the lowest round-trip fares we found.
More flights from London
All routesMore flights to Philadelphia
All routes- Orlando to PhiladelphiaMCO → PHLfrom $77
- Los Angeles to PhiladelphiaLAX → PHLfrom $179
- Fort Lauderdale to PhiladelphiaFLL → PHLfrom $83
- San Juan to PhiladelphiaSJU → PHLfrom $144
- Boston to PhiladelphiaBOS → PHLfrom $63
- Toronto to PhiladelphiaYYZ → PHLfrom $90
- Montreal to PhiladelphiaYUL → PHLfrom $89
- Halifax to PhiladelphiaYHZ → PHLfrom $106