The contributors of Flight-Report published 5 reviews on 2 airlines on the route Tehran - Imam Khomeini Intl (IKA) → London - Heathrow (LHR). The airline with the best average rating is Iran Air with 7.7/10. The average flight time is 6 hours and 21 minutes.
Airlines on this route are:
Frequent travelers recommend "Independent First" at IKA for comfort and services.
The airport of Tehran (IKA) is rated as moderately efficient (security/immigration/police checks); make sure to arrive with sufficient time.