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Cheap Southwest flights

LHR
25 Apr — 2 May1
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 26 March 2026. In the last 7 days, Cheapflights users made a total of 858,174 searches.

Cheapest Route

£65

Most Popular Route

PHX to LAX

Shortest flight

0h 40m

Longest Flight

9h 55m
Flying from Kona Intl to Honolulu
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Flying from Phoenix Sky Harbor Intl to Los Angeles Los Angeles
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Flying from Kahului to Kona Intl
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Flying from Seattle/Tacoma Intl to San Francisco
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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 26 March 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
4,333 reviews
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Overview

Entertainment

7.5

Boarding

8.1

Food

7.0

Comfort

8.0

Crew

8.6

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 Kona Intl to Honolulu, which is £65. This round-trip flight has 0 stops. For a one-way domestic Southwest flight, the cheapest route is Lihue to Kahului (0 stops) for £33.

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