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Heathrow

$544+ 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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — LHR
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
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 December 23, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/22. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:21 pmGRB - LHR
1 stop11h 04mMultiple Airlines
Mon 1/510:25 amLHR - GRB
1 stop12h 22mMultiple Airlines
Deal found 12/22$5,749

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 December 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$605
(Cheapflightsfares)

One-way from

$544
(Delta)

Popular in

November

Cheapest in

October

Average price

$1,587
Provider with most accurate pricing for Green Bay Austin-Straubel-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Green Bay Austin-Straubel-London Heathrow flights.
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From Green Bay Austin-Straubel to London Heathrow
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One-way flight from Green Bay Austin-Straubel to London Heathrow
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Highest demand for flights based on searches. 43% potential increase in price ($1,039 potential increase over avg. RT price).
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Cheapest flight prices on average. 36% potential price decrease ($356 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 23, 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

Wed 1/7

10:42 am-7:55 am

1 stop15h 13m

London Heathrow

Wed 1/21

6:35 am-9:31 pm

2 stops20h 56m

$605

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Thu 2/5

5:12 am-9:00 am

1 stop21h 48m

London Heathrow

Thu 2/12

11:45 am-8:41 pm

2 stops14h 56m

$629

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Wed 1/7

2:39 pm-10:50 am

2 stops14h 11m

London Heathrow

Wed 1/21

11:10 am-9:31 pm

2 stops16h 21m

$642

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Mon 2/2

5:12 am-9:00 am

1 stop21h 48m

London Heathrow

Tue 2/10

8:55 am-10:30 pm

1 stop19h 35m

$657

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Mon 4/13

11:30 am-10:35 pm

2 stops29h 05m

London Heathrow

Mon 4/20

7:25 pm-11:06 pm

2 stops33h 41m

$667

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Fri 2/20

3:44 pm-7:55 am

1 stop10h 11m

London Heathrow

Tue 2/24

6:50 am-9:30 pm

2 stops20h 40m

$687

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Sat 6/6

5:25 pm-1:45 pm

2 stops14h 20m

$544

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Sun 6/7

5:30 am-6:45 am

1 stop19h 15m

$588

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Sun 6/7

5:30 am-6:20 am

2 stops18h 50m

$588

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Sat 6/6

4:00 pm-1:10 pm

1 stop15h 10m

$589

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

Showing 1-10 of 12 results
1
2
  • 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.

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 December 23, 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
9,109 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,109 reviews
United Airlines
7.4
Good
9,109 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
American Airlines
7.2
Good
11,050 reviews
United Airlines
7.4
Good
9,109 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
British Airways
6.7
Okay
7,607 reviews
United Airlines
7.4
Good
9,109 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

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 14h 11m. Lufthansa provides one of the quickest options available for as low as $642. 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 51% 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.

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
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Croydon
Hayes
Orpington
Northampton
Watford
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames
Folkestone

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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 December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$650Average$779FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$699Average$1,391FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$701Average$867FlexibilityNo cancel feeOn-time69%

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