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Cheap United Airlines flights

LHR
18 Jun — 25 Jun1
1 adult

United Airlines information

Discover detailed information about United Airlines flights, including average fare prices, reviews, and more. Flight info is based on data from user searches last updated on 13 June 2025. In the last 7 days, Cheapflights users made a total of 858,174 searches.

Cheapest Route

£38

Most Popular Route

SAN to SFO

Shortest flight

0h 50m

Longest Flight

15h 51m
Flying from Ontario to San Francisco
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Flying from San Diego to San Francisco
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Flying from Denver Intl to Cheyenne
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Flying from San Diego to Vancouver Intl
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Cheapest United Airlines flights
Explore the most affordable United Airlines flight options available. Find the lowest fares based on data from user searches, with prices last updated on 13 June 2025.

Tue 15/719:04BOS - EDI
2 stops32h 21mUnited Airlines
Tue 22/709:00EDI - BOS
1 stop29h 55mUnited Airlines
Deal found £396
Sun 20/718:40BOS - LHR
1 stop10h 20mUnited Airlines
Thu 31/712:15LHR - BOS
1 stop11h 41mUnited Airlines
Deal found £407
Sun 3/812:15BOS - BHX
2 stops15h 30mUnited Airlines
Tue 19/805:55BHX - BOS
2 stops16h 53mUnited Airlines
Deal found £482

United Airlines Reviews

Read reviews and feedback from other travellers about their experiences with United Airlines sourced from user searches. These reviews were last updated on 13 June 2025 and provide insights based on users' experiences. In the last 7 days, Cheapflights users made a total of 858,174 searches.
United Airlines
7.4
Good
8,790 reviews
Check prices
Overview

Entertainment

7.0

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6
Pros +
  • "Everything was cool, smooth flight." (in 2442 reviews)
  • The flight arrived early and that was great (in 143 reviews)
  • Flight was quick and easy. (in 2395 reviews)
Cons -
  • Customer service was very poor. (in 236 reviews)
  • I will Never fly on them Again! (in 554 reviews)
  • Entertainment wasn’t working well at all (in 1245 reviews)

Frequently asked questions about United Airlines

  • What are the most popular United Airlines airports?

    The most popular airports for United Airlines are Chicago O'Hare Intl, San Francisco, and Newark according to our data. Flights to or from any of these airports should be available via United Airlines year-round.

  • What is United Airlines’s cheapest domestic flight?

    The cheapest domestic United Airlines flight is flying Ontario to San Francisco, which is £38. This round-trip flight has 0 stops. For a one-way domestic United Airlines flight, the cheapest route is Ontario to San Francisco (0 stops) for £21.

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