United/Air Canada $452 Dallas DFW to London LHR Feb-May

United Airlines and Air Canada ticket prices for Dallas DFW to London LHR are $450 round trip through online travel sites and $500 through their own airline websites from mid-Feb to mid-May and Sep-Dec dates.

Momondo.com search Dallas DFW – London LHR

Dallas DFW – Toronto YYZ – London LHR (Air Canada)

London LHR – Chicago ORD – Dallas DFW (United)

$452.16 round trip TravelMerry.com (Momondo.com link).

Wed May 10 – Thu May 18 (Google Flights link for low fare dates, but most searches did not return bookable links on Google Flights).

Momondo.com search Dallas DFW – London LHR

$445.56 TravelMerry.com Tue Sep 26 – Sat Oct 7

Loyalty Traveler January Airfare Deals.