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Cheap Southwest flights

LHR
25 Mar — 1 Apr1
1 adult
1 adult, Economy, 0 bags

Southwest information

Discover detailed information about Southwest flights, including average fare prices, reviews, and more. Flight info is based on data from user searches last updated on 23 February 2026. In the last 7 days, Cheapflights users made a total of 858,174 searches.

Cheapest Route

£67

Most Popular Route

SFO to LAX

Shortest flight

0h 45m

Longest Flight

10h 20m
Flying from San Francisco to Los Angeles
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Flying from San Francisco to Los Angeles
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Flying from Kahului to Honolulu
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Flying from San Francisco to Burbank Bob Hope
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Southwest Reviews

Read reviews and feedback from other travellers about their experiences with Southwest sourced from user searches. These reviews were last updated on 23 February 2026 and provide insights based on users' experiences. In the last 7 days, Cheapflights users made a total of 858,174 searches.
Southwest
8.0
Very Good
4,300 reviews
Check prices
Overview

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Frequently asked questions about Southwest

  • What are the most popular Southwest airports?

    The most popular airports for Southwest are Phoenix Sky Harbor Intl, Denver Intl, and Dallas Love Field according to our data. Flights to or from any of these airports should be available via Southwest year-round.

  • What is Southwest’s cheapest domestic flight?

    The cheapest domestic Southwest flight is flying San Francisco to Los Angeles, which is £67. This round-trip flight has 0 stops. For a one-way domestic Southwest flight, the cheapest route is Chicago Midway to Lambert-St Louis (0 stops) for £36.

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