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 $631. Other airlines that can offer you cheap pricing are American Airlines, from $654, and Delta, from $659. You may be able to fly from Green Bay to London Heathrow Airport for 36% 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 KLM, with whom users have recently found tickets for as low as $419. However, be on the lookout for offers from British Airways and United Airlines, as they are both options that can get you from Green Bay to London Heathrow Airport for a low price.

What is the cheapest day to fly from Green Bay to London Heathrow Airport?

Travelers seeking maximum savings on their Green Bay to London Heathrow Airport flight should consider departing on Thursday afternoons when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

What are the most popular airlines that fly from Green Bay to London Heathrow Airport?

The most popular airlines flying from Green Bay to London Heathrow Airport are American Airlines, British Airways and United Airlines. Something to consider prior to booking your flight.

What is the cheapest day to fly round-trip from Green Bay to London Heathrow Airport?

Sunday flights are found to be more expensive to fly from Green Bay to London Heathrow Airport. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London Heathrow Airport.

What is the cheapest month to fly from Green Bay to London Heathrow Airport?

Our data shows that March tends to be the cheapest month to fly to London Heathrow Airport from Green Bay. Users have commonly found prices around $947 for the month, but tickets can be as low as $724. Due to multiple factors, prepare for potentially higher prices in June.

What is the cheapest time of day to fly from GRB to LHR?

It’s optimal to fly from Green Bay to London Heathrow Airport in the morning. By choosing this option you can save up to 1% on the cost of your flight, compared to a flight at noon.

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.

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.

$419+ Flights from Green Bay to London Heathrow Airport

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Cheap flight deals from Green Bay to Heathrow

Round-trip from	$631 (United Airlines)
One-way from	$419 (KLM)
Popular in	June
Cheapest in	March
Average price	$1,204

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. 12% potential increase in price ($139 potential increase over avg. RT price).

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Cheapest flight prices on average. 5% potential price decrease ($52 potential savings vs. average RT price).

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Average for round-trip flights in July 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 July 3, 2025.

Wed 9/246:15 amGRB - LHR

1 stop23h 30mUnited Airlines

Fri 10/32:05 pmLHR - GRB

2 stops26h 00mUnited Airlines

Deal found 7/2

$631

Wed 9/244:35 pmGRB - LHR

1 stop12h 30mAmerican Airlines

Fri 10/311:05 amLHR - GRB

1 stop12h 51mAmerican Airlines

Deal found 7/2

$654

Wed 9/2411:07 amGRB - LHR

2 stops15h 43mDelta

Tue 9/3012:25 pmLHR - GRB

2 stops16h 35mDelta

Deal found 7/1

$659

Sun 10/193:01 pmGRB - LHR

1 stop15h 14mBritish Airways

Sun 10/2612:35 pmLHR - GRB

1 stop12h 03mBritish Airways

Deal found 7/3

$693

Tue 9/301:20 pmGRB - LHR

2 stops27h 20mLufthansa

Sat 10/117:10 pmLHR - GRB

2 stops27h 40mLufthansa

Deal found 7/1

$723

Fri 7/1812:10 pmGRB - LHR

1 stop19h 00mKLM

Fri 7/253:15 pmLHR - GRB

1 stop14h 07mKLM

Deal found 7/3

$775

Best flights from Green Bay to Heathrow
Discover carefully curated flight deals from Green Bay to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2025.

Wed 9/246:15 amGRB - LHR

1 stop23h 30mUnited Airlines

Fri 10/32:05 pmLHR - GRB

2 stops26h 00mUnited Airlines

Deal found 7/2

$631

Wed 9/244:35 pmGRB - LHR

1 stop12h 30mAmerican Airlines

Fri 10/311:05 amLHR - GRB

1 stop12h 51mAmerican Airlines

Deal found 7/2

$654

Wed 9/2411:07 amGRB - LHR

2 stops15h 43mDelta

Tue 9/3012:25 pmLHR - GRB

2 stops16h 35mDelta

Deal found 7/1

$659

Sun 10/193:01 pmGRB - LHR

1 stop15h 14mBritish Airways

Sun 10/2612:35 pmLHR - GRB

1 stop12h 03mBritish Airways

Deal found 7/3

$693

Tue 9/301:20 pmGRB - LHR

2 stops27h 20mLufthansa

Sat 10/117:10 pmLHR - GRB

2 stops27h 40mLufthansa

Deal found 7/1

$723

Fri 7/1812:10 pmGRB - LHR

1 stop19h 00mKLM

Fri 7/253:15 pmLHR - GRB

1 stop14h 07mKLM

Deal found 7/3

$775

Last-minute flights from Green Bay to Heathrow
Discover last-minute flight deals from Green Bay to Heathrow. Data last updated July 3, 2025 and is based on user searches.

Tue 7/84:21 pmGRB - LHR

1 stop14h 49mVirgin Atlantic

Tue 7/1511:30 amLHR - GRB

2 stops16h 33mVirgin Atlantic

Deal found 7/1

$1,246

Tue 7/82:51 pmGRB - LHR

1 stop14h 14mAmerican Airlines

Tue 7/151:10 pmLHR - GRB

1 stop16h 19mAmerican Airlines

Deal found 7/1

$1,278

Tue 7/81:10 pmGRB - LHR

2 stops21h 55mMultiple Airlines

Tue 7/157:50 pmLHR - GRB

3 stops26h 58mMultiple Airlines

Deal found 7/1

$2,371

Wed 7/92:51 pmGRB - LHR

1 stop14h 14mBritish Airways

Wed 7/165:10 pmLHR - GRB

2 stops30h 39mBritish Airways

Deal found 7/3

$1,741

Wed 7/910:46 amGRB - LHR

2 stops13h 44mUnited Airlines

Wed 7/162:05 pmLHR - GRB

2 stops26h 06mUnited Airlines

Deal found 7/3

$1,782

Wed 7/165:03 pmGRB - LHR

1 stop9h 52mDelta

Wed 7/308:40 amLHR - GRB

2 stops19h 23mDelta

Deal found 7/3

$726

Fri 7/1812:10 pmGRB - LHR

1 stop19h 00mKLM

Fri 7/253:15 pmLHR - GRB

1 stop14h 07mKLM

Deal found 7/3

$775

Fri 7/181:10 pmGRB - LHR

1 stop11h 10mLufthansa

Fri 7/252:10 pmLHR - GRB

1 stop13h 27mLufthansa

Deal found 7/3

$2,006

Mon 7/212:51 pmGRB - LHR

1 stop10h 29mBritish Airways

Mon 7/282:25 pmLHR - GRB

1 stop33h 24mBritish Airways

Deal found 7/2

$768

Sat 8/161:10 pmGRB - LHR

2 stops14h 50mUnited Airlines

Sat 8/238:30 amLHR - GRB

2 stops19h 13mUnited Airlines

Deal found 7/2

$742

Sat 8/161:10 pmGRB - LHR

2 stops15h 30mMultiple Airlines

Sat 8/236:40 amLHR - GRB

3 stops21h 03mMultiple Airlines

Deal found 7/2

$2,362

One-way flights from Green Bay to Heathrow
Search for one-way flight options from Green Bay to Heathrow. Find affordable one-way fares based on user searches. Data last updated July 3, 2025.

Wed 9/105:11 pmGRB - LHR

1 stop9h 44mKLM

Deal found 7/1

$419

Wed 9/104:35 pmGRB - LHR

2 stops17h 50mBritish Airways

Deal found 7/1

$424

Sun 7/138:00 amGRB - LHR

2 stops20h 00mUnited Airlines

Deal found 6/30

$429

Sun 7/134:21 pmGRB - LHR

2 stops15h 09mDelta

Deal found 6/30

$484

Sun 7/131:10 pmGRB - LHR

3 stops37h 00mMultiple Airlines

Deal found 6/30

$1,451

Cheapflights Fare Finder

Use the filters below to find and compare flights from Green Bay to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Wed 9/24

6:15 am-11:45 am

1 stop23h 30m

London Heathrow

Fri 10/3

2:05 pm-10:05 am

2 stops26h 00m

$631

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Wed 9/24

4:35 pm-11:05 am

1 stop12h 30m

London Heathrow

Fri 10/3

11:05 am-5:56 pm

1 stop12h 51m

$654

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Wed 9/24

11:07 am-8:50 am

2 stops15h 43m

London Heathrow

Tue 9/30

12:25 pm-11:00 pm

2 stops16h 35m

$659

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Sun 10/19

3:01 pm-12:15 pm

1 stop15h 14m

London Heathrow

Sun 10/26

12:35 pm-7:38 pm

1 stop12h 03m

$693

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Tue 9/30

1:20 pm-10:40 pm

2 stops27h 20m

London Heathrow

Sat 10/11

7:10 pm-4:50 pm

2 stops27h 40m

$723

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Fri 7/18

12:10 pm-1:10 pm

1 stop19h 00m

London Heathrow

Fri 7/25

3:15 pm-11:22 pm

1 stop14h 07m

$775

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Wed 9/10

5:11 pm-8:55 am

1 stop9h 44m

$419

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Wed 9/10

4:35 pm-4:25 pm

2 stops17h 50m

$424

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Sun 7/13

8:00 am-10:00 am

2 stops20h 00m

$429

Green BayLondon

GRB - LHR

GRBLHR

Green Bay Austin-Straubel

Sun 7/13

4:21 pm-1:30 pm

2 stops15h 09m

$484

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 11 results

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 $1,098). 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

See what other customers who have flown with Delta, KLM, and United Airlines 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.

Delta

8.0

Very good

7,970 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,970 reviews

Delta

8.0

Very good

7,970 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,366 reviews

Delta

8.0

Very good

7,970 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,845 reviews

Delta

8.0

Very good

7,970 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,970 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Lufthansa

6.8

Okay

7,207 reviews

Delta

8.0

Very good

7,970 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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.
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 $631. Other airlines that can offer you cheap pricing are American Airlines, from $654, and Delta, from $659. You may be able to fly from Green Bay to London Heathrow Airport for 36% 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 KLM, with whom users have recently found tickets for as low as $419. However, be on the lookout for offers from British Airways and United Airlines, 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 $1,098). 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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Top 3 airlines flying from Green Bay to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$699	Average$1,412	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$701	Average$857	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$734	Average$840	FlexibilityNo cancel fee	On-time70%

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$419+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Green Bay to Heathrow with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Green Bay to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Green Bay to Heathrow

Cheapest flights from Green Bay to HeathrowExplore 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 July 3, 2025.

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 July 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Green Bay to London Heathrow Airport that are best for you.

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.

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?

Reviews of airlines servicing Heathrow

See what other customers who have flown with Delta, KLM, and United Airlines 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.

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?

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

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

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

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

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

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

Traveling to a place near Green Bay?

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.

Alternative routes for Green Bay to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Green Bay to Heathrow

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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 July 3, 2025.