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Cheap United Airlines flights

LHR
22 Aug — 29 Aug1
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 17 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

1h 01m

Longest Flight

8h 20m
Flying from San Francisco to Ontario
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Flying from San Francisco to Los Angeles
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Flying from Houston George Bush Intcntl to Austin Bergstrom
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Flying from Raleigh-Durham to Sarasota Bradenton 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 17 August 2025.

Sat 6/915:20BOS - LHR
1 stop15h 25mUnited Airlines
Mon 8/911:05LHR - BOS
2 stops35h 29mUnited Airlines
Deal found £337
Tue 11/1118:40BOS - LHR
1 stop31h 30mUnited Airlines
Fri 14/1106:35LHR - BOS
1 stop17h 00mUnited Airlines
Deal found £348
Mon 6/1016:23BOS - EDI
1 stop10h 42mUnited Airlines
Tue 14/1009:00EDI - BOS
2 stops35h 13mUnited Airlines
Deal found £381

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 17 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
8,919 reviews
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Overview

Comfort

7.3

Entertainment

7.1

Crew

8.1

Food

6.6

Boarding

7.7
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 Ontario, which is £53. This round-trip flight has 0 stops. For a one-way domestic United Airlines flight, the cheapest route is Houston George Bush Intcntl to Memphis (0 stops) for £29.

  • What is United Airlines’s cheapest international flight?

    The least expensive round-trip international United Airlines flight is: -Halifax Intl to Washington, D.C. Dulles Intl, -1 stop, -£107 per ticket United Airlines has international one-way flights available, but the cheapest is a flight from Seattle/Tacoma Intl to Edmonton for just £38. This flight has 1 stop.

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