$330+ Cheap flights from Allentown (ABE) to Heathrow (LHR)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — LHR
Oct 11 — Oct 181
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Allentown to Heathrow with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Allentown to Heathrow
Cheapest
Best
Last-minute
One-way
Cheapest flights from Allentown to HeathrowExplore the most affordable flight options available from Allentown to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2026.
Explore the most affordable flight options available from Allentown to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2026.
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:03 pm -
1 stop14h 12m
Thu 10/296:30 am -
2 stops19h 49m
Deal found 9/10![Delta logo]()
$789
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:39 am -
2 stops20h 26m
Sun 11/16:30 am -
2 stops15h 46m
Deal found 9/10![Delta logo]()
$794
This KLM deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:00 pm -
1 stop19h 15m
Thu 10/2910:50 am -
1 stop15h 29m
Deal found 9/10![KLM logo]()
$796
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:30 am -
1 stop21h 30m
Sat 11/218:55 am -
1 stop13h 20m
Deal found 9/10![Delta logo]()
$846
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1912:56 pm -
1 stop19h 19m
Sat 9/2610:45 am -
2 stops16h 31m
Deal found 9/10![Delta logo]()
$851
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/25:36 pm -
1 stop13h 24m
Thu 11/126:50 am -
2 stops15h 06m
Deal found 9/8![United Airlines logo]()
$867
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/16:15 am -
2 stops43h 25m
Thu 11/126:50 am -
2 stops15h 06m
Deal found 9/8![United Airlines logo]()
$871
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:36 pm -
1 stop32h 19m
Fri 11/136:50 am -
2 stops19h 12m
Deal found 9/8![United Airlines logo]()
$872
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:36 pm -
2 stops32h 54m
Thu 11/126:50 am -
2 stops15h 06m
Deal found 9/8![United Airlines logo]()
$875
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/165:36 pm -
2 stops58h 09m
Fri 11/206:35 am -
2 stops39h 21m
Deal found 9/9![United Airlines logo]()
$878
Best flights from Allentown to HeathrowDiscover carefully curated flight deals from Allentown to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2026.
Discover carefully curated flight deals from Allentown to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2026.
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/251:00 pm -
1 stop14h 50m
Sun 11/16:30 am -
2 stops15h 46m
Deal found 9/10![Delta logo]()
$789
This KLM deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:00 pm -
1 stop19h 15m
Thu 10/2910:50 am -
1 stop15h 29m
Deal found 9/10![KLM logo]()
$796
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/25:36 pm -
2 stops22h 44m
Wed 11/116:50 am -
2 stops15h 06m
Deal found 9/9![United Airlines logo]()
$871
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:03 pm -
1 stop14h 12m
Thu 10/296:30 am -
2 stops19h 49m
Deal found 9/10![Delta logo]()
$789
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:03 pm -
1 stop14h 12m
Fri 10/306:30 am -
2 stops19h 49m
Deal found 9/9![Delta logo]()
$789
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/165:36 pm -
2 stops58h 09m
Fri 11/206:35 am -
2 stops39h 21m
Deal found 9/9![United Airlines logo]()
$878
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:20 am -
2 stops22h 40m
Thu 10/296:35 am -
2 stops18h 27m
Deal found 9/9![United Airlines logo]()
$882
Last-minute flights from Allentown to HeathrowDiscover last-minute flight deals from Allentown to Heathrow. Data last updated September 11, 2026 and is based on user searches.
Discover last-minute flight deals from Allentown to Heathrow. Data last updated September 11, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1912:56 pm -
1 stop19h 19m
Sat 9/2610:45 am -
2 stops16h 31m
Deal found 9/10![Delta logo]()
$851
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/610:37 am -
2 stops15h 18m
Mon 10/1211:05 am -
2 stops34h 57m
Deal found 9/7![United Airlines logo]()
$884
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:03 pm -
1 stop14h 12m
Thu 10/296:30 am -
2 stops19h 49m
Deal found 9/10![Delta logo]()
$789
This KLM deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:00 pm -
1 stop19h 15m
Thu 10/2910:50 am -
1 stop15h 29m
Deal found 9/10![KLM logo]()
$796
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:20 am -
2 stops22h 40m
Fri 10/301:00 pm -
2 stops36h 02m
Deal found 9/9![United Airlines logo]()
$879
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:20 am -
2 stops22h 40m
Thu 10/296:35 am -
2 stops18h 27m
Deal found 9/9![United Airlines logo]()
$882
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:20 am -
2 stops19h 55m
Thu 10/296:50 am -
2 stops18h 12m
Deal found 9/8![United Airlines logo]()
$883
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:39 am -
2 stops20h 26m
Sun 11/16:30 am -
2 stops15h 46m
Deal found 9/10![Delta logo]()
$794
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:36 pm -
1 stop32h 19m
Fri 11/136:50 am -
2 stops19h 12m
Deal found 9/8![United Airlines logo]()
$872
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:36 pm -
2 stops32h 54m
Thu 11/126:50 am -
2 stops15h 06m
Deal found 9/8![United Airlines logo]()
$875
One-way flights from Allentown to HeathrowSearch for one-way flight options from Allentown to Heathrow. Find affordable one-way fares based on user searches. Data last updated September 11, 2026.
Search for one-way flight options from Allentown to Heathrow. Find affordable one-way fares based on user searches. Data last updated September 11, 2026.
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:43 pm -
2 stops22h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![United Airlines logo]()
$340
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1312:56 pm -
2 stops13h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$558
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:15 am -
1 stop19h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![United Airlines logo]()
$629
This KLM deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:08 pm -
1 stop12h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![KLM logo]()
$633
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1310:32 am -
2 stops24h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![United Airlines logo]()
$642
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/265:43 pm -
1 stop34h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![United Airlines logo]()
$648
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:04 pm -
1 stop12h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Delta logo]()
$786
This AranGrant deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:15 am -
1 stop20h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Lufthansa logo]()
$3,324
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/175:36 pm -
2 stops22h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![United Airlines logo]()
$3,683
Find flight deals from Allentown to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from Allentown (ABE) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $789 (Delta) |
One-way from | $340 (United Airlines) |
Cheapflights Fare Finder
Customize your flight search to find flights from Allentown to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 11, 2026.
Use the filters below to find and compare flights from Allentown to London Heathrow Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
AllentownLondon
ABE Allentown-Bethlehem - LHR London Heathrow
ABELHR
Allentown-Bethlehem
Wed 1/6
1:00 pm-7:50 am
1 stop13h 50m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$330
AllentownLondon
ABE Allentown-Bethlehem - LHR London Heathrow
ABELHR
Allentown-Bethlehem
Sun 2/7
1:00 pm-9:00 am
1 stop15h 00m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$330
AllentownLondon
ABE Allentown-Bethlehem - LHR London Heathrow
ABELHR
Allentown-Bethlehem
Sat 10/3
6:20 am-6:45 am
1 stop19h 25m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$340
AllentownLondon
ABE Allentown-Bethlehem - LHR London Heathrow
ABELHR
Allentown-Bethlehem
Tue 1/5
5:40 pm-11:40 am
1 stop13h 00m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$516
AllentownLondon
ABE Allentown-Bethlehem - LHR London Heathrow
ABELHR
Allentown-Bethlehem
Mon 1/4
5:40 pm-11:40 am
1 stop13h 00m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$586
Quickest round-trip
AllentownLondon
ABE Allentown-Bethlehem - LHR London Heathrow
ABELHR
Allentown-Bethlehem
Sun 1/3
6:01 pm-11:40 am
1 stop12h 39m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$586
AllentownLondon
ABE Allentown-Bethlehem - LHR London Heathrow
ABELHR
Allentown-Bethlehem
Wed 9/23
6:15 am-6:55 am
2 stops19h 40m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$629
AllentownLondon
ABE Allentown-Bethlehem - LHR London Heathrow
ABELHR
Allentown-Bethlehem
Sun 10/25
1:00 pm-7:50 am
1 stop14h 50m
London Heathrow
Sun 11/1
6:30 am-5:16 pm
2 stops15h 46m
$789
AllentownLondon
ABE Allentown-Bethlehem - LHR London Heathrow
ABELHR
Allentown-Bethlehem
Thu 10/15
6:03 pm-1:15 pm
1 stop14h 12m
London Heathrow
Thu 10/29
6:30 am-10:19 pm
2 stops19h 49m
$789
AllentownLondon
ABE Allentown-Bethlehem - LHR London Heathrow
ABELHR
Allentown-Bethlehem
Thu 10/15
6:03 pm-1:15 pm
1 stop14h 12m
London Heathrow
Fri 10/30
6:30 am-10:19 pm
2 stops19h 49m
$789
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Allentown to Heathrow
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Allentown to Heathrow in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Allentown-London Heathrow Airport flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Allentown-London Heathrow Airport flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Allentown-London Heathrow Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Allentown-London Heathrow Airport flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Allentown-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Allentown to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from Allentown with our price prediction graph.
ABE-LHR
Estimated round-trip 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.
Related info for your journey
Find useful and relevant information for your journey from Allentown to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near London Heathrow Airport?
Book flights to London Heathrow Airport if you plan to visit one of these locationsIlford
Dorking
Gatwick
Hounslow
Harrow
Wembley
Southend-on-Sea
Basingstoke
Watford
Northampton
Dartford
Winchester
Croydon
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
Luton
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Heathrow flight routes
Other flight options
Other flights from Allentown
Popular flights