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Cheap United Airlines flights

LHR
31 Aug — 7 Sep1
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 26 August 2025. In the last 7 days, Cheapflights users made a total of 858,174 searches.

Cheapest Route

£53

Most Popular Route

SFO to LAX

Shortest flight

0h 46m

Longest Flight

8h 45m
Flying from San Francisco to San Diego
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Flying from San Francisco to Los Angeles
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Flying from Denver Intl to Cheyenne
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Flying from Miami to Guatemala City La Aurora
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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 26 August 2025.

Sun 15/218:25BOS - LHR
1 stop32h 55mUnited Airlines
Wed 18/206:50LHR - BOS
2 stops20h 05mUnited Airlines
Deal found £338
Sat 20/912:30BOS - LHR
1 stop18h 15mUnited Airlines
Mon 22/911:05LHR - BOS
2 stops36h 50mUnited Airlines
Deal found £339
Fri 14/1116:20BOS - BHX
1 stop15h 15mUnited Airlines
Sun 16/1106:00BHX - BOS
2 stops20h 27mUnited Airlines
Deal found £358

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 26 August 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
8,943 reviews
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Overview

Comfort

7.3

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1
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, Newark, and San Francisco 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 San Francisco to San Diego, which is £53. This round-trip flight has 0 stops. For a one-way domestic United Airlines flight, the cheapest route is San Francisco to San Diego (0 stops) for £29.

  • What is United Airlines’s cheapest international flight?

    The least expensive round-trip international United Airlines flight is: -Chicago O'Hare Intl to Québec City, -0 stops, -£89 per ticket United Airlines has international one-way flights available, but the cheapest is a flight from Chicago O'Hare Intl to Québec City for just £32. This flight has 0 stops.

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