When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 34 days in advance, which can save you up to 21% on flights from London to Delaware compared to booking the week you need them. Waiting 34 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £528. For sooner than that we have options available in the next 3 days from £637.
Flights from London to Delaware lean towards being more expensive in August. Prices are generally better when you fly from London to Delaware in February, with the cheapest ticket starting at £350.
When flying from London to Delaware, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Fly from
Fly to
Budget
£419 - £486
Route
Depart
Return
Price
London HeathrowPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Wed 15/5
1 stop13h 25m
Philadelphia
Wed 22/5
1 stop11h 39m
London HeathrowPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Tue 10/9
1 stop20h 35m
Philadelphia
Tue 24/9
1 stop12h 18m
London GatwickPhiladelphia
LGW - PHL
LGWPHL
London Gatwick
Tue 4/6
1 stop12h 43m
Philadelphia
Tue 11/6
1 stop10h 20m
London GatwickPhiladelphia
LGW - PHL
LGWPHL
London Gatwick
Tue 11/6
1 stop18h 38m
Philadelphia
Tue 18/6
1 stop19h 40m
London HeathrowPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 13/5
1 stop28h 40m
Philadelphia
Mon 20/5
Nonstop7h 05m
London HeathrowPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 13/5
1 stop10h 58m
Philadelphia
Mon 20/5
1 stop12h 50m
London HeathrowPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 13/5
Nonstop7h 55m
Philadelphia
Mon 20/5
Nonstop7h 10m
London HeathrowPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Tue 10/9
2 stops17h 35m
Philadelphia
Tue 24/9
2 stops13h 55m
London HeathrowPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 13/5
2 stops19h 46m
Philadelphia
Mon 20/5
2 stops23h 00m
No data available for this route at this time. Please check back soon.
Crew
Overall
Entertainment
Boarding
Food
Comfort
Reviews
When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Crew
Overall
Entertainment
Boarding
Food
Comfort
Reviews
When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Crew
Overall
Entertainment
Boarding
Food
Comfort
Reviews
When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Crew
Overall
Entertainment
Boarding
Food
Comfort
Reviews
When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Crew
Overall
Entertainment
Boarding
Food
Comfort
Reviews
When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Crew
Overall
Entertainment
Boarding
Food
Comfort
Reviews
When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Deals for London to Delaware flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.
Millions of users choose and trust Cheapflights to book the best flight deals from London to Delaware for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Certainly. Search results for flights to Delaware from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Delaware from London today and book when prices fit your budget.