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$668+ 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 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
ALO — LON
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
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 February 4, 2026.

This American Airlines deal was found by Cheapflights users on 2/1. 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 3/193:10 pm
ALO
-
LHR
2 stops15h 05m
American Airlines
Thu 3/261:30 pm
LHR
-
ALO
2 stops15h 23m
American Airlines
Deal found 2/1$668
This KAYAK deal was found by Cheapflights users on 2/3. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/53:09 pm
ALO
-
LHR
1 stop10h 56m
Multiple Airlines
Sat 7/111:00 pm
LHR
-
ALO
2 stops40h 59m
Multiple Airlines
Deal found 2/3$1,221
This KAYAK deal was found by Cheapflights users on 2/3. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/53:09 pm
ALO
-
LHR
2 stops13h 06m
British Airways
Sat 7/113:20 pm
LHR
-
ALO
2 stops29h 19m
British Airways
Deal found 2/3$1,285
This American Airlines deal was found by Cheapflights users on 2/3. 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.
Sun 7/53:09 pm
ALO
-
LHR
1 stop10h 56m
American Airlines
Sat 7/112:45 pm
LHR
-
ALO
1 stop15h 14m
American Airlines
Deal found 2/3$1,392
This American Airlines deal was found by Cheapflights users on 2/3. 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.
Fri 3/203:10 pm
ALO
-
LHR
1 stop12h 25m
American Airlines
Fri 3/271:30 pm
LHR
-
ALO
2 stops15h 23m
American Airlines
Deal found 2/3$1,435
This British Airways deal was found by Cheapflights users on 2/3. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/205:20 am
ALO
-
LHR
1 stop20h 35m
Multiple Airlines
Fri 3/273:45 pm
LHR
-
ALO
1 stop13h 08m
Multiple Airlines
Deal found 2/3$1,673

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 February 4, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$668
(American Airlines)
Provider with most accurate pricing for Waterloo-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Waterloo-London (LON) flights.
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From Waterloo to London (LON)
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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 February 4, 2026.
Use the filters below to find and compare flights from Waterloo to London that are best for you.

Fly from

Waterloo

Fly to

London

Route

Depart

Return

Price

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Thu 3/19

3:10 pm-11:15 am

2 stops15h 05m

London Heathrow

Thu 3/26

1:30 pm-11:53 pm

2 stops15h 23m

$668

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Sun 7/5

3:09 pm-8:05 am

1 stop10h 56m

London Heathrow

Sat 7/11

1:00 pm-11:59 pm

2 stops40h 59m

$1,221

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Sun 7/5

3:09 pm-10:15 am

2 stops13h 06m

London Heathrow

Sat 7/11

3:20 pm-2:39 pm

2 stops29h 19m

$1,285

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Sun 7/5

3:09 pm-8:05 am

1 stop10h 56m

London Heathrow

Sat 7/11

2:45 pm-11:59 pm

1 stop15h 14m

$1,392

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Fri 3/20

3:10 pm-9:30 am

2 stops13h 20m

London Heathrow

Fri 3/27

1:30 pm-11:53 pm

2 stops15h 23m

$1,435

WaterlooLondon

ALO - LHR

ALOLHR

Waterloo

Fri 3/20

5:20 am-6:55 am

1 stop20h 35m

London Heathrow

Fri 3/27

3:45 pm-11:53 pm

1 stop13h 08m

$1,673

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

  • 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 $582). Flying from Waterloo, Iowa to London in February is currently the most expensive (average of $802). 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 13h 06m. There are 4081 mi between Waterloo, Iowa and London. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $582). Flying from Waterloo, Iowa to London in February is currently the most expensive (average of $802). 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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