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$948+ Cheap flights from Waterloo, IA (ALO) to London (LON)

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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
ALO — LON
May 7 — May 141
Thu 5/7
Thu 5/14
1 adult, Economy
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Cheap flight deals from Waterloo to London

Cheapest flights from Waterloo to London
Explore the most affordable flight options available from Waterloo to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 7, 2026.

This American Airlines deal was found by Cheapflights users on 4/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/134:30 pm
ALO
-
LHR
1 stop10h 35m
American Airlines
Mon 10/2611:00 am
LHR
-
ALO
1 stop17h 19m
American Airlines
Deal found 4/6$948
This Finnair deal was found by Cheapflights users on 4/6. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/45:40 am
ALO
-
LHR
1 stop23h 35m
Multiple Airlines
Mon 5/113:15 pm
LHR
-
ALO
1 stop14h 40m
Multiple Airlines
Deal found 4/6$1,002
This American Airlines deal was found by Cheapflights users on 4/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/42:23 pm
ALO
-
LHR
1 stop10h 27m
American Airlines
Mon 5/119:45 am
LHR
-
ALO
1 stop20h 10m
American Airlines
Deal found 4/6$1,006
This American Airlines deal was found by Cheapflights users on 4/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/185:40 am
ALO
-
LHR
1 stop20h 00m
American Airlines
Mon 5/253:15 pm
LHR
-
ALO
1 stop14h 54m
American Airlines
Deal found 4/3$1,069
This American Airlines deal was found by Cheapflights users on 4/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/213:02 pm
ALO
-
LHR
1 stop15h 13m
American Airlines
Thu 5/282:45 pm
LHR
-
ALO
1 stop15h 24m
American Airlines
Deal found 4/6$1,281
This deal was found by Cheapflights users on 4/2. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/162:23 pm
ALO
-
LHR
1 stop14h 07m
American Airlines
Sun 5/312:45 pm
LHR
-
ALO
1 stop15h 25m
American Airlines
Deal found 4/2$1,328
This deal was found by Cheapflights users on 4/2. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/162:23 pm
ALO
-
LHR
1 stop14h 07m
American Airlines
Sat 5/302:45 pm
LHR
-
ALO
1 stop15h 24m
American Airlines
Deal found 4/2$1,381

Find flight deals from Waterloo to London

Discover tips and strategies to find the most affordable flight options for your journey from Waterloo (ALO) to London (LON). 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 April 7, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$1,002
(Finnair)
Provider with most accurate pricing for Waterloo-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Waterloo-London (LON) flights.
Search Deals
From Waterloo to London (LON)
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Waterloo to London 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 2,558,603 searches. Data last updated April 7, 2026.
Use the filters below to find and compare flights from Waterloo to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Mon 5/4

5:40 am-11:15 am

1 stop23h 35m

London Heathrow

Mon 5/11

3:15 pm-11:55 pm

1 stop14h 40m

$1,002

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Mon 5/4

2:23 pm-6:50 am

1 stop10h 27m

London Heathrow

Mon 5/11

9:45 am-11:55 pm

1 stop20h 10m

$1,006

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Mon 5/18

5:40 am-7:40 am

1 stop20h 00m

London Heathrow

Mon 5/25

2:30 pm-12:09 am

2 stops15h 39m

$1,270

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Thu 5/21

3:02 pm-12:15 pm

1 stop15h 13m

London Heathrow

Thu 5/28

2:45 pm-12:09 am

1 stop15h 24m

$1,281

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Sat 5/16

2:23 pm-10:30 am

1 stop14h 07m

London Heathrow

Sat 5/30

2:45 pm-12:09 am

1 stop15h 24m

$1,381

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Fri 5/15

2:23 pm-10:30 am

1 stop14h 07m

London Heathrow

Sun 5/31

2:45 pm-12:10 am

1 stop15h 25m

$1,446
Quickest round-trip

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Wed 7/1

3:02 pm-9:05 am

1 stop12h 03m

London Heathrow

Sun 7/5

2:45 pm-11:59 pm

1 stop15h 14m

$1,484

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Fri 5/15

2:23 pm-10:30 am

1 stop14h 07m

London Heathrow

Sat 5/30

2:45 pm-12:09 am

1 stop15h 24m

$1,499

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Wed 7/1

3:02 pm-1:30 pm

2 stops16h 28m

London Heathrow

Sun 7/5

1:25 pm-11:59 pm

2 stops16h 34m

$1,704

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/6

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Waterloo, Iowa-London flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Waterloo, Iowa-London flight deals on Cheapflights vs. Ovago 90-95% of the time. Price accuracy is based on data collected from Waterloo, Iowa-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Waterloo, Iowa-London 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 Waterloo, Iowa-London 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 Waterloo to London

Have a flexible travel schedule? Discover the best time to fly to London from Waterloo with our price prediction graph.
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.

Cheapflights Insights

Everything you need to know about your flight from Waterloo to London

What is the cheapest month to book a flight from Waterloo, Iowa to London?

Currently, August is the cheapest month in which you can book a flight from Waterloo, Iowa to London (average of $583). Flying from Waterloo, Iowa to London in February is currently the most expensive (average of $898). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Waterloo to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Waterloo to London?

    Waterloo (ALO) is the airport you will fly out of if you book a flight from Waterloo to London. You should not have trouble finding flights to London from Waterloo; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Waterloo airport to London. It is only a 5.3 mi journey to Waterloo (ALO) from Waterloo’s city center.

  • How long is the flight from Waterloo, Iowa to London?

    Departing from Waterloo, Iowa to London will take you 10h 27m. There are 4081 mi between Waterloo, Iowa and London.

  • Can I find deals for flights from Waterloo to London that include hotel bookings?

    Yes. In addition to deals on Waterloo to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Waterloo to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Waterloo to London.

  • Can I find deals for business class flights from Waterloo to London?

    Yes. Cheapflights offers flight deals from Waterloo to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Waterloo, Iowa to London?

    Currently, August is the cheapest month in which you can book a flight from Waterloo, Iowa to London (average of $583). Flying from Waterloo, Iowa to London in February is currently the most expensive (average of $898). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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