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Cheap Southwest flights

LHR
14 Mar — 21 Mar1
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 12 February 2026. In the last 7 days, Cheapflights users made a total of 858,174 searches.

Cheapest Route

£57

Most Popular Route

SFO to LAX

Shortest flight

0h 45m

Longest Flight

11h 40m
Flying from Kahului to Lihue
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Flying from San Francisco to Los Angeles
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Flying from Honolulu to Lihue
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Flying from Austin Bergstrom to Miami
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International Southwest flights
Search for international Southwest flight options. Find affordable international airfare based on user searches. Data last updated 12 February 2026.

Sun 19/407:30
CMH
-
CUN
Nonstop3h 30m
Southwest
Thu 23/415:05
CUN
-
CMH
1 stop7h 10m
Southwest
Deal found £316
Sun 3/506:00
CMH
-
CUN
1 stop8h 50m
Southwest
Sun 10/511:55
CUN
-
CMH
Nonstop3h 20m
Southwest
Deal found £334
Sat 25/407:25
CMH
-
CUN
Nonstop3h 30m
Southwest
Thu 30/414:25
CUN
-
CMH
1 stop7h 20m
Southwest
Deal found £335

Southwest Reviews

Read reviews and feedback from other travellers about their experiences with Southwest sourced from user searches. These reviews were last updated on 12 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
4,280 reviews
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Overview

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Food

7.0

Frequently asked questions about Southwest

  • What are the most popular Southwest airports?

    The most popular airports for Southwest are Phoenix Sky Harbor Intl, Dallas Love Field, and Denver Intl 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 Kahului to Lihue, which is £57. This round-trip flight has 0 stops. For a one-way domestic Southwest flight, the cheapest route is Hilo Intl to Honolulu (0 stops) for £29.

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