£239 Cheap Flights from Harrisburg (MDT) to London (LHR)

View £239 flight on Wed, 21 Oct 2026Opens in a new window

Popular airlines from Harrisburg Intl. Airport (MDT) to Heathrow Airport (LHR)

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Cheap Flights from Harrisburg (MDT) to London (LHR)

Prices were available within the past 7 days and start at £239 for one-way flights and £633 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KLM
Mon, 17 Aug - Wed, 26 Aug
MDT
Harrisburg
LHR
London
£633 Return, found 4 days ago
£633
Return
found 4 days ago
Select KLM flight, departing Mon, 17 Aug from Harrisburg to London, returning Wed, 26 Aug, priced at £633 found 4 days ago
Air France
Mon, 17 Aug - Wed, 26 Aug
MDT
Harrisburg
LHR
London
£638 Return, found 4 days ago
£638
Return
found 4 days ago
Select Air France flight, departing Mon, 17 Aug from Harrisburg to London, returning Wed, 26 Aug, priced at £638 found 4 days ago
Lufthansa
Fri, 4 Sept - Mon, 7 Sept
MDT
Harrisburg
LHR
London
£642 Return, found 6 days ago
£642
Return
found 6 days ago
Select Lufthansa flight, departing Fri, 4 Sept from Harrisburg to London, returning Mon, 7 Sept, priced at £642 found 6 days ago
Air France
Mon, 17 Aug - Wed, 26 Aug
MDT
Harrisburg
LHR
London
£648 Return, found 4 days ago
£648
Return
found 4 days ago
Select Air France flight, departing Mon, 17 Aug from Harrisburg to London, returning Wed, 26 Aug, priced at £648 found 4 days ago
Air France
Mon, 17 Aug - Wed, 26 Aug
MDT
Harrisburg
LHR
London
£652 Return, found 4 days ago
£652
Return
found 4 days ago
Select Air France flight, departing Mon, 17 Aug from Harrisburg to London, returning Wed, 26 Aug, priced at £652 found 4 days ago
Air France
Mon, 17 Aug - Wed, 26 Aug
MDT
Harrisburg
LHR
London
£654 Return, found 4 days ago
£654
Return
found 4 days ago
Select Air France flight, departing Mon, 17 Aug from Harrisburg to London, returning Wed, 26 Aug, priced at £654 found 4 days ago
British Airways
Mon, 17 Aug - Wed, 26 Aug
MDT
Harrisburg
LHR
London
£655 Return, found 4 days ago
£655
Return
found 4 days ago
Select British Airways flight, departing Mon, 17 Aug from Harrisburg to London, returning Wed, 26 Aug, priced at £655 found 4 days ago
Air France
Mon, 17 Aug - Wed, 26 Aug
MDT
Harrisburg
LHR
London
£658 Return, found 4 days ago
£658
Return
found 4 days ago
Select Air France flight, departing Mon, 17 Aug from Harrisburg to London, returning Wed, 26 Aug, priced at £658 found 4 days ago
Air France
Mon, 17 Aug - Wed, 26 Aug
MDT
Harrisburg
LHR
London
£674 Return, found 4 days ago
£674
Return
found 4 days ago
Select Air France flight, departing Mon, 17 Aug from Harrisburg to London, returning Wed, 26 Aug, priced at £674 found 4 days ago
American Airlines
Thu, 4 Mar - Thu, 11 Mar
MDT
Harrisburg
LHR
London
£675 Return, found 3 days ago
£675
Return
found 3 days ago
Select American Airlines flight, departing Thu, 4 Mar from Harrisburg to London, returning Thu, 11 Mar, priced at £675 found 3 days ago

Frequently asked questions

How do I find cheap flights from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow)?
To find a cheap flight from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow)?
There are approximately 35 connecting flights per day from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow). Some common connection points include O'Hare Intl. (ORD), Washington Dulles Intl. (IAD), and Charlotte-Douglas Intl. (CLT).
What is the earliest flight from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow)?
The earliest flight from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow) typically departs at approximately 5:00 AM local time. This service is operated by American Airlines and is seasonal, active only in January. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow)?
If you're looking for the most flight options from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow), Saturday is typically the busiest day, offering around 34 flights. This gives you a good selection for your travel plans. Major airlines on this route include American Airlines, United Airlines, and Delta Air Lines. When comparing flight options throughout the week, Saturday has notably more flight options compared to other days.
What are the most popular departure times for flights from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow)?
The most popular departure times for flights from Harrisburg International Airport (MDT) to London Heathrow (LHR) are in the afternoon, from 3pm to 6pm. Approximately 26% of passengers prefer this time window. Many major carriers, including British Airways, American Airlines and United Airlines, offer flights during this window. This timing works well because you can have a productive morning before your flight, and you'll arrive in London in the morning, ready to start your day.
How long does it take to fly from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow)?
Flights from MDT to LHR with one stop typically take around 15 hours, covering approximately 3,584 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow)?
Select the "Business class" and "First class" filters when looking for MDT to LHR flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow) flight with Expedia?
It's easy to earn miles on a Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for London from Harrisburg Intl. (MDT)?
From Harrisburg Intl. (MDT), you can fly into Heathrow (LHR) to reach London. Some flights may connect through major hubs like Washington Dulles Intl. (IAD), O'Hare Intl. (ORD), Charlotte-Douglas Intl. (CLT) before reaching London. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow) at the last minute?
Typically, booking a last minute flight from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow) flight and hotel package?
Securing a Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow)?
If you booked your Harrisburg, PA (MDT-Harrisburg Intl.) to London (LHR-Heathrow) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Harrisburg Intl.
Destination airport
Heathrow
Airlines serving
Air France, British Airways, KLM, Lufthansa
Return price
£632
Distance
5733 km

Book with confidence

Compare flights from Harrisburg to London easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Harrisburg to London. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Heathrow in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Harrisburg Intl. to Heathrow.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Harrisburg Intl. (MDT) to Heathrow (LHR)

The easiest way to view the best deals on flights from Harrisburg to London today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Harrisburg Intl. to Heathrow start at just £633 and range up to £675.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Harrisburg and London
  • booking your flight during August, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Harrisburg to London flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Harrisburg Intl. to Heathrow for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Harrisburg to London easily and book with confidence

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*Available to Expedia members.