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$408+ Cheap flights from Green Bay (GRB) to Heathrow (LHR)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — LHR
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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Cheap flight deals from Green Bay to Heathrow

Cheapest flights from Green Bay to Heathrow
Explore the most affordable flight options available from Green Bay to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 3, 2026.

This KLM deal was found by Cheapflights users on 1/31. 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.
Mon 3/212:08 pm
GRB
-
LHR
1 stop12h 57m
KLM
Mon 3/1611:45 am
LHR
-
GRB
2 stops13h 51m
KLM
Deal found 1/31$636
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:37 pm
GRB
-
LHR
1 stop10h 38m
British Airways
Mon 9/76:10 pm
LHR
-
GRB
2 stops35h 18m
British Airways
Deal found 2/1$650
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/512:00 pm
GRB
-
LHR
1 stop19h 05m
Delta
Fri 5/156:30 am
LHR
-
GRB
2 stops20h 56m
Delta
Deal found 2/2$651
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3012:00 pm
GRB
-
LHR
1 stop19h 05m
Delta
Wed 4/86:30 am
LHR
-
GRB
2 stops15h 08m
Delta
Deal found 2/2$652
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/185:28 pm
GRB
-
LHR
1 stop12h 47m
United Airlines
Wed 3/251:25 pm
LHR
-
GRB
2 stops25h 34m
United Airlines
Deal found 2/1$653
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/39:46 am
GRB
-
LHR
1 stop19h 29m
British Airways
Mon 5/117:25 pm
LHR
-
GRB
2 stops32h 14m
British Airways
Deal found 2/1$658
This United Airlines deal was found by Cheapflights users on 2/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/43:48 pm
GRB
-
LHR
1 stop10h 42m
United Airlines
Tue 5/126:50 am
LHR
-
GRB
2 stops14h 20m
United Airlines
Deal found 2/2$660
This United Airlines deal was found by Cheapflights users on 2/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/52:35 pm
GRB
-
LHR
2 stops13h 25m
United Airlines
Thu 5/146:50 am
LHR
-
GRB
2 stops14h 20m
United Airlines
Deal found 2/2$663
This United Airlines deal was found by Cheapflights users on 2/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/610:40 am
GRB
-
LHR
2 stops18h 00m
United Airlines
Tue 5/126:50 am
LHR
-
GRB
2 stops14h 20m
United Airlines
Deal found 2/2$664
This United Airlines deal was found by Cheapflights users on 2/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/25:30 pm
GRB
-
LHR
1 stop31h 15m
United Airlines
Thu 5/146:50 am
LHR
-
GRB
2 stops14h 20m
United Airlines
Deal found 2/2$665
This United Airlines deal was found by Cheapflights users on 2/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/25:30 pm
GRB
-
LHR
1 stop31h 15m
United Airlines
Wed 5/137:25 am
LHR
-
GRB
2 stops20h 01m
United Airlines
Deal found 2/2$666

Find flight deals from Green Bay to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Green Bay (GRB) 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 February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$636
(KLM)

One-way from

$408
(United Airlines)

Popular in

November

Cheapest in

October

Average price

$920
Provider with most accurate pricing for Green Bay Austin-Straubel-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Green Bay Austin-Straubel-London Heathrow flights.
Search Deals
From Green Bay Austin-Straubel to London Heathrow
Search Deals
One-way flight from Green Bay Austin-Straubel to London Heathrow
Search Deals
Highest demand for flights based on searches. 45% potential increase in price ($1,085 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 33% potential price decrease ($328 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Green Bay 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 2,558,603 searches. Data last updated February 3, 2026.
Use the filters below to find and compare flights from Green Bay to London Heathrow Airport that are best for you.

Fly from

Green Bay

Fly to

Heathrow

Route

Depart

Return

Price

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Sun 5/3

6:00 am-1:05 pm

1 stop25h 05m

London Heathrow

Fri 5/15

6:30 am-9:26 pm

2 stops20h 56m

$651

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Mon 3/30

12:00 pm-1:05 pm

1 stop19h 05m

London Heathrow

Wed 4/8

6:30 am-3:38 pm

2 stops15h 08m

$652

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Wed 3/18

5:28 pm-11:15 am

1 stop12h 47m

London Heathrow

Wed 3/25

1:25 pm-9:59 am

2 stops25h 34m

$653

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Tue 5/5

6:00 am-6:25 am

2 stops18h 25m

London Heathrow

Tue 5/12

9:55 am-8:34 pm

2 stops16h 39m

$656

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Wed 5/6

12:00 pm-9:15 am

2 stops15h 15m

London Heathrow

Fri 5/15

6:30 am-9:26 pm

2 stops20h 56m

$656

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Wed 5/6

12:00 pm-1:05 pm

1 stop19h 05m

London Heathrow

Wed 5/13

8:55 am-8:34 pm

2 stops17h 39m

$658

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Wed 5/6

2:35 pm-8:30 am

1 stop11h 55m

London Heathrow

Tue 5/12

6:50 am-3:10 pm

2 stops14h 20m

$660

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Mon 3/9

5:17 pm-8:45 am

1 stop10h 28m

London Heathrow

Mon 3/23

11:05 am-10:02 pm

1 stop15h 57m

$664

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Wed 3/18

11:12 am-8:45 am

1 stop16h 33m

London Heathrow

Wed 3/25

11:05 am-10:02 pm

1 stop15h 57m

$664

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Sat 5/2

5:30 pm-6:45 am

1 stop31h 15m

London Heathrow

Tue 5/12

6:50 am-3:10 pm

2 stops14h 20m

$665

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 12 results
1
2

Compare providers for flights from Green Bay 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 Green Bay to Heathrow in February.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Green Bay-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Green Bay-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Green Bay-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Green Bay-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub 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 Green Bay-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 Green Bay to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Green Bay 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 Green Bay to London Heathrow Airport

What is the cheapest month to book a flight from Green Bay to London Heathrow Airport?

Currently, October is the cheapest month in which you can book a flight from Green Bay to London Heathrow Airport (average of $650). Flying from Green Bay to London Heathrow Airport in June is currently the most expensive (average of $1,300). 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.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated February 3, 2026.
See what other customers who have flown with United Airlines, American Airlines, and British Airways from Green Bay to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,236 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,236 reviews
United Airlines
7.4
Good
9,236 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.2
Good
11,216 reviews
United Airlines
7.4
Good
9,236 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
British Airways
6.7
Okay
7,712 reviews
United Airlines
7.4
Good
9,236 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Green Bay to Heathrow. 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 Green Bay to London Heathrow?

    Most people fly from Green Bay Austin-Straubel (GRB) if they book a flight from Green Bay to London Heathrow. On average, Austin-Straubel has 0 outbound flights to London Heathrow per day from 3 airlines. Green Bay Austin-Straubel is conveniently located just 5.9 mi from Green Bay’s city center.

  • How long is the flight from Green Bay to London Heathrow Airport?

    A quick flight from Green Bay to London Heathrow Airport can take about 12h 47m. Delta provides one of the quickest options available for as low as $653. Airlines will cover a distance of 3833 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Green Bay to London Heathrow Airport round-trip?

    Cheapflights users have booked flights from Green Bay to London Heathrow Airport round-trip from $650. Other airlines that can offer you cheap pricing are American Airlines, from $699, and United Airlines, from $701. You may be able to fly from Green Bay to London Heathrow Airport for 49% less than the average price by searching for these airlines.

  • Can I find deals for flights from Green Bay to Heathrow that include hotel bookings?

    Yes. In addition to deals on Green Bay to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Green Bay to Heathrow?

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

  • Can I find deals for business class flights from Green Bay to Heathrow?

    Yes. Cheapflights offers flight deals from Green Bay to Heathrow 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 Green Bay to London Heathrow Airport?

    Currently, October is the cheapest month in which you can book a flight from Green Bay to London Heathrow Airport (average of $650). Flying from Green Bay to London Heathrow Airport in June is currently the most expensive (average of $1,300). 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Hounslow
Croydon
Southend-on-Sea
Harrow
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Northampton
Watford
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

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.

Top 3 airlines flying from Green Bay to Heathrow

Discover the top 3 airlines that operate flights from Green Bay to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$650Average$840FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$699Average$1,391FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$701Average$857FlexibilityNo cancel feeOn-time69%

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