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£55+ Cheap flights from Delaware

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ILG — LHR
20 Dec — 27 Dec1
1 adult
1 adult, Economy, 0 bags

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Cheapest flights from Delaware
Explore the most affordable flight options available from Delaware. Find the lowest fares based on data from user searches, with prices last updated on 20 November 2025.

Tue 16/1207:06PHL - SFO
1 stop9h 57mAlaska Airlines
Tue 16/1218:20SFO - PHL
1 stop8h 26mAlaska Airlines
Deal found 17/11£220
Fri 9/116:10PHL - SFO
Nonstop6h 25mAmerican Airlines
Tue 13/123:13SFO - PHL
Nonstop5h 16mAmerican Airlines
Deal found 19/11£221
Wed 6/510:00PHL - SFO
1 stop10h 49mUnited Airlines
Fri 15/523:05SFO - PHL
Nonstop5h 40mUnited Airlines
Deal found 18/11£225
Sat 13/1206:15PHL - SFO
Nonstop6h 25mUnited Airlines
Sun 11/100:43SFO - PHL
1 stop7h 52mUnited Airlines
Deal found 16/11£228
Sat 13/1215:35PHL - SFO
1 stop8h 39mUnited Airlines
Sat 13/1200:43SFO - PHL
1 stop7h 54mUnited Airlines
Deal found 19/11£231
Thu 5/212:15PHL - SFO
1 stop14h 15mJetBlue
Tue 10/208:00SFO - PHL
1 stop12h 34mJetBlue
Deal found 18/11£232
Sat 6/1207:06PHL - SFO
1 stop11h 40mAlaska Airlines
Wed 10/1209:00SFO - PHL
1 stop17h 46mAlaska Airlines
Deal found 19/11£235
Sun 15/206:08PHL - SFO
1 stop10h 42mDelta
Fri 20/200:40SFO - PHL
1 stop6h 52mDelta
Deal found 17/11£236
Mon 22/1208:15PHL - SFO
Nonstop6h 28mUnited Airlines
Mon 29/1220:47SFO - PHL
Nonstop5h 24mUnited Airlines
Deal found 19/11£236
Sat 13/1206:00PHL - SFO
2 stops12h 57mDelta
Wed 17/1205:55SFO - PHL
1 stop8h 34mDelta
Deal found 19/11£237
Sat 10/112:11PHL - SFO
2 stops14h 17mDelta
Mon 12/118:30SFO - PHL
2 stops11h 20mDelta
Deal found 19/11£240
Thu 19/306:00PHL - SFO
1 stop11h 50mJetBlue
Thu 26/308:20SFO - PHL
1 stop10h 27mJetBlue
Deal found 18/11£242

Find flights from Delaware within your budget

 
Find flights departing from Delaware that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 20 November 2025. In the last 7 days, Cheapflights users made a total of 858,174 searches

Fly to

Heathrow

Route

Depart

Return

Price

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Thu 22/1

08:35-12:03

Nonstop6h 28m

San Francisco

Tue 27/1

13:25-21:52

Nonstop5h 27m

£220

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Fri 13/2

18:20-21:50

Nonstop6h 30m

San Francisco

Mon 16/2

23:59-10:24

1 stop7h 25m

£228

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Wed 8/4

06:15-12:08

1 stop8h 53m

San Francisco

Sun 12/4

23:05-07:45

Nonstop5h 40m

£228

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Fri 16/1

08:35-12:03

Nonstop6h 28m

San Francisco

Sun 18/1

05:00-15:50

1 stop7h 50m

£228

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Wed 25/2

08:35-12:06

Nonstop6h 31m

San Francisco

Sun 1/3

23:20-09:48

1 stop7h 28m

£228

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Sat 14/2

17:23-22:58

1 stop8h 35m

San Francisco

Sat 21/2

06:00-16:38

1 stop7h 38m

£236

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Sat 13/12

09:45-14:23

1 stop7h 38m

San Francisco

Sun 14/12

00:30-10:51

1 stop7h 21m

£236

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Fri 9/1

06:15-11:36

1 stop8h 21m

San Francisco

Mon 12/1

00:40-10:31

1 stop6h 51m

£236

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Sun 15/2

06:00-10:59

1 stop7h 59m

San Francisco

Tue 24/2

14:05-00:28

1 stop7h 23m

£236

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Wed 25/2

20:02-01:28

1 stop8h 26m

San Francisco

Tue 3/3

00:43-11:37

1 stop7h 54m

£236

Flights are sorted by cheapest return flights first.

Deals found on 17/11

Showing 1-10 of 60 results
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Best time to book a flight from Delaware

Have a flexible travel schedule? Discover the best time to fly from Delaware with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Delaware

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No data available for this route at this time. Please check back soon.

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Direct flights from USA

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Direct flights from Philadelphia

Related info for your journey

Access useful and relevant information related to your journey from Delaware. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 20 November 2025.

  • Where are the cheapest places to fly to from Delaware?

    Check out the cheapest flights from Delaware to embark to:
    Travel from Philadelphia to London from £359 round trip
    Travel from Philadelphia to Edinburgh from £429 round trip

  • How does Cheapflights help users find flights from Delaware?

    When you search for this flight from Delaware, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the best flight for you.

  • Why should you use Cheapflights to find cheap flight tickets from Delaware?

    Millions of users choose and trust Cheapflights to book the best flight deals from Delaware for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

  • Can Cheapflights find flights from Delaware with no change fees?

    Users can book flights with no change fees policies with our dedicated filters. Book flights from Delaware flexibly with Cheapflights today.

  • Can Cheapflights notify me if prices for flights from Delaware become cheaper?

    Not ready to book yet? You can track prices for flights from Delaware on Cheapflights with our Price Alerts feature and get notified when better prices are available.

See more FAQs

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Delaware?

When you search for this flight from Delaware, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the best flight for you.

Why should you use Cheapflights to find cheap flight tickets from Delaware?

Millions of users choose and trust Cheapflights to book the best flight deals from Delaware for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Delaware with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Delaware flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Delaware become cheaper?

Not ready to book yet? You can track prices for flights from Delaware on Cheapflights with our Price Alerts feature and get notified when better prices are available.

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