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Heathrow

$624+ Cheap flights from Green Bay (GRB) 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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — LHR
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap 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 September 16, 2025.

Round-trip from

$623
(Delta)

Popular in

December

Cheapest in

October

Average price

$765
From Green Bay Austin-Straubel to London Heathrow
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($196 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($54 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 16, 2025.

This Delta deal was found by Cheapflights users on 9/16. 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.
Wed 9/245:34 amGRB - LHR
1 stop19h 11mDelta
Fri 10/38:40 amLHR - GRB
2 stops20h 20mDelta
Deal found 9/16$624
This KLM deal was found by Cheapflights users on 9/16. 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 9/245:34 amGRB - LHR
1 stop19h 11mKLM
Fri 10/31:05 pmLHR - GRB
1 stop15h 55mKLM
Deal found 9/16$631
This Delta deal was found by Cheapflights users on 9/16. 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.
Wed 9/245:34 amGRB - LHR
1 stop19h 41mDelta
Tue 9/308:25 pmLHR - GRB
2 stops20h 58mDelta
Deal found 9/16$635
This Netflights deal was found by Cheapflights users on 9/15. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/282:52 pmGRB - LHR
1 stop11h 53mVirgin Atlantic
Thu 12/48:55 amLHR - GRB
1 stop19h 43mVirgin Atlantic
Deal found 9/15$647
This Delta deal was found by Cheapflights users on 9/15. 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.
Fri 11/285:15 amGRB - LHR
1 stop20h 35mDelta
Thu 12/48:55 amLHR - GRB
2 stops19h 43mDelta
Deal found 9/15$673
This Delta deal was found by Cheapflights users on 9/15. 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 10/215:30 amGRB - LHR
1 stop19h 15mDelta
Mon 11/36:20 amLHR - GRB
2 stops15h 16mDelta
Deal found 9/15$713
This British Airways deal was found by Cheapflights users on 9/14. 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.
Thu 10/163:02 pmGRB - LHR
1 stop13h 28mBritish Airways
Fri 10/241:10 pmLHR - GRB
1 stop12h 28mBritish Airways
Deal found 9/14$718

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 September 16, 2025.
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

Fri 11/28

11:10 am-9:00 am

2 stops15h 50m

London Heathrow

Thu 12/4

8:55 am-10:38 pm

2 stops19h 43m

$677

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Fri 11/28

5:15 am-6:25 am

1 stop19h 10m

London Heathrow

Thu 12/4

12:30 pm-10:38 pm

1 stop16h 08m

$687

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Tue 10/21

7:00 am-6:25 am

2 stops17h 25m

London Heathrow

Mon 11/3

9:00 am-10:52 pm

2 stops19h 52m

$717

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Thu 10/16

3:02 pm-10:30 am

1 stop13h 28m

London Heathrow

Fri 10/24

1:10 pm-7:38 pm

1 stop12h 28m

$718

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Tue 10/21

9:44 am-7:20 am

1 stop15h 36m

London Heathrow

Mon 11/3

11:00 am-7:22 pm

1 stop14h 22m

$718

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Fri 1/16

6:45 am-7:05 am

1 stop18h 20m

London Heathrow

Tue 1/20

6:30 am-4:38 pm

2 stops16h 08m

$722

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Thu 10/16

2:40 pm-8:20 am

1 stop11h 40m

London Heathrow

Fri 10/24

2:05 pm-3:09 pm

2 stops31h 04m

$778

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Fri 12/26

8:00 am-6:40 am

2 stops16h 40m

$649

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Fri 12/26

4:19 pm-8:45 am

1 stop10h 26m

$725

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Fri 12/26

4:19 pm-8:45 am

1 stop10h 26m

$725

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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, November is the cheapest month in which you can book a flight from Green Bay to London Heathrow Airport (average of $661). Flying from Green Bay to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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.

How much does it cost to fly round-trip from Green Bay to London Heathrow Airport?

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 September 16, 2025.
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
8,924 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,924 reviews
United Airlines
7.4
Good
8,924 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,924 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.7
Okay
7,363 reviews
United Airlines
7.4
Good
8,924 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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 15h 50m. Delta provides one of the quickest options available for as low as $677. 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 $701, and United Airlines, from $701. You may be able to fly from Green Bay to London Heathrow Airport for 32% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Green Bay to London Heathrow Airport one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $649. However, be on the lookout for offers from Delta and Virgin Atlantic, as they are both options that can get you from Green Bay to London Heathrow Airport for a low price.

  • 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, November is the cheapest month in which you can book a flight from Green Bay to London Heathrow Airport (average of $661). Flying from Green Bay to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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
Hounslow
Hayes
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Wembley
Folkestone
Chichester

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Green Bay to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$650Average$818FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$701Average$867FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$701Average$1,401FlexibilityNo cancel feeOn-time71%

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