If you are traveling to Heathrow Airport between Jul 8 and September 14, you can receive 50% off the ticket price by using link below. Adults essentially get a return ticket for the price of a single and the kids get to go for free which is how you can really save some cash.
Link to Heathrow Express summer sale:
Get this deal
Restrictions on getting 50% off Heathrow Express tickets with this coupon code:
Offer valid for booking and travel between 00.01 8th July 2011 and 23.59 4th September 2011.
Children must be accompanied by minimum of 2 adults in order to travel for free.
Valid for a maximum of 3 children 15 years or under.
Bookings and outward journey must be made before 23:59 4th September 2011, with return journey valid one month from outward journey.
Offer is 50% off total ticket price.
Offer not available at Heathrow Express ticket offices, onboard the train, at our station ticket machines or via our mobile app.
This offer is not available in conjunction with any other offer or railcard discount and is non-refundable.
Heathrow Express reserves the right to change or withdraw this offer at any time.