The cheapest times to fly from LHR to IAH are

  • January 8th to March 25th
  • April 23rd to July 1st
  • October 29th to December 2nd

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from LHR to IAH is mid January. Prices can be as high as $1506 for Saturday flights during early August, or as low as $478 for Monday flights around mid January.


When to Fly to Houston

Flying from London (LHR) to Houston, TX (IAH) will usually cost between $502 to $1245 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid January with an average ticket price of $515. Due to high demand the most expensive time to fly is early August, with an average price of $1420. Planning your trip to low-cost times can easily save you $906 on economy flights and even more on first-class flights. Generally, any price below $692 can be considered a good price for a round-trip LHR to IAH flight.

See below for a graph of average weekly prices for the LHR to IAH route. All prices are for round-trip tickets in USD.

LHR to IAH Flight Prices

Compared to other flights, the LHR to IAH flight is cheaper than the average and costs about as much as the average flight leaving from London. The average price per mile (for a direct flight) is $0.09, which is far below average.


Flight Prices by Day of the Week

Monday is usually the cheapest day to depart and return on this flight. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $89 (9%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Monday and returning a week later will cost an average of $718. Return trip prices are from the IAH to LHR flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from LHR to IAH can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 9 hour 40 minutes may be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is a nonstop flight from LHR to IAH while comparing.

Destination alternative #1: Austin – Bergstrom International Airport (AUS) in Austin, TX

  • 140 miles (225 km) away from IAH
  • Usually 36.56% less expensive than IAH
  • Nonstop flights available

See LHR to AUS flights


Flight Hacking LHR to IAH

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from LHR to IAH — but Champion Traveler does!

Hack #1: Boston, MA (LHR > BOS > IAH)

  • Price for both tickets: $601
  • Average savings: $92 (13.22%)

See LHR to DUB flights

Hack #2: Dublin (LHR > DUB > IAH)

  • Price for both tickets: $613
  • Average savings: $79 (11.42%)

See LHR to BOS flights

Hack #3: New York, NY (LHR > LGA > IAH)

  • Price for both tickets: $627
  • Average savings: $66 (9.47%)

See LHR to LGA flights


Flight Questions Answered

Still have questions about flying from LHR to IAH? We’ve got answers.

Which airlines fly this route?

You can find 26 major airlines flying this route most often: Aer Lingus, Aeromexico, Air Canada, Air France, Air New Zealand, Alaska, Alitalia, American, Austrian, British Airways, Brussels Airlines, Condor, Delta, Finnair, Frontier, Iberia, Icelandair, KLM, LOT, Lufthansa, Singapore Airlines, SWISS, Tap Air Portugal, Turkish Airlines, United, Virgin Atlantic, and potentially more during busy seasons.

How far away is it from George Bush Intercontinental/Houston Airport to London Heathrow Airport?

The distance between the two airports is roughly 4823 miles or 7762 kilometers.

How long does it take to fly from LHR to IAH?

The real-world flight time for a nonstop LHR to IAH flight is about 9 hour 40 minutes.

How many flights go between London and Houston, TX?

It depends on the day of the week and the date, but a typical day might have around 54 available flights from LHR to IAH.


Airport Location Info


Departing Airport

Origination codeLHR
Origination airport nameLondon Heathrow Airport
Countrythe United Kingdom

Return Airport

Destination codeIAH
Destination airport nameGeorge Bush Intercontinental/Houston Airport
CityHouston, TX
Countrythe United States


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.