Airline guide
Southwest AirlinesIATA code WN
Baggage allowances, fare rules, check-in cut-offs and contact details for Southwest Airlines. Policy figures are read from Southwest Airlines’s own published pages and each one shows where it came from and when we checked it.
- Home country
- United States
- Destinations
- 73 in 1 country
- Route data Jul 2026
Southwest Airlines at a glance
Cabin bag size
Not yet verified. What’s missing (Cabin bag size)
Cabin bag weight
Not yet verified. What’s missing (Cabin bag weight)
Checked bag
Not yet verified. What’s missing (Checked bag)
Online check-in
Covered in full in the section below. Read it (Online check-in)
Airport check-in closes
Covered in full in the section below. Read it (Airport check-in closes)
Customer service
- Customer service phone
- +1-800-435-9792
Verified 5 Oct 2026southwest.com (opens in a new tab)Full rules: Customer service
Southwest Airlines carry-on baggage allowance
Cabin-bag size and weight limits have not been verified against the airline’s current published allowance.
Still to check: Cabin bag size, Economy carry-on weight, Business & First carry-on weight.
Check directly:Southwest Airlines website (opens in a new tab)Conditions of carriage (opens in a new tab) (link from Duffel reference data, 24 Aug 2026)
Southwest Airlines checked baggage allowance
Checked allowances differ by route band and cabin, and none have been verified against this airline’s published conditions of carriage yet.
Still to check: Economy checked allowance, Business checked allowance, First checked allowance.
Check directly:Southwest Airlines website (opens in a new tab)Conditions of carriage (opens in a new tab) (link from Duffel reference data, 24 Aug 2026)
What Southwest Airlines’s cheapest fare includes
- Lowest fare
- Wanna Get Away: 1 carry-on bag, 1 personal item, and 2 checked bags up to 50 lbs each INCLUDED
- Seat selection
- Open seating system based on boarding position group (A, B, C); no assigned seat numbers
- Changes and cancellations
- No change fees; reusable flight credit for cancellations made at least 10 minutes prior to departure
Southwest Airlines cabins and aircraft
Source: Originfacts route-network dataset, built from TravelPayouts route data (updated 2026-07). Not verified by hand.
Cabin names and seat details are not yet verified for Southwest Airlines. What the route dataset does record is which aircraft types have appeared on its routes:
- Boeing 737-300
- Boeing 737-500
- Boeing 737-700
- Boeing 737-800
Seat pitch is a property of the aircraft cabin rather than of the airline, so a single figure for this carrier’s legroom would be misleading. Pitch publishes per aircraft type once each figure is verified.
A record of what has flown, not a current fleet
The route dataset accumulates equipment over time and is not a fleet register: it can name types Southwest Airlines has retired, miss recent additions, and it covers only flights sold under WN. Seat pitch and cabin configuration are not verified for this carrier.
If your Southwest Airlines flight is delayed or cancelled
Which delay and cancellation regime applies depends on where each flight departs. The mapping has not been verified for this carrier yet.
Still to check: Care, Rebooking and refunds, Compensation.
Check directly:Southwest Airlines website (opens in a new tab)Conditions of carriage (opens in a new tab) (link from Duffel reference data, 24 Aug 2026)
Southwest Airlines check-in times and airport cut-offs
Southwest may begin boarding as early as 30 minutes before scheduled departure.
- Boarding start
- Boarding may begin as early as 30 minutes before scheduled departure; Southwest encourages passengers to be in the gate area by then.
- Gate cutoff
- All passengers must have their boarding passes and be in the gate area at least 10 minutes before scheduled departure, or Southwest may cancel the reservation and you will not be eligible for denied boarding compensation.
- No show
- If you are not travelling, cancel at least 10 minutes before the original scheduled departure time; otherwise the reservation is cancelled and funds and points may be forfeited.
How to contact Southwest Airlines
- Customer service phone
- +1-800-435-9792
Where Southwest Airlines flies
Source: Originfacts route-network dataset, built from TravelPayouts route data (updated 2026-07). Not verified by hand.
We track 976 Southwest Airlines routes serving 73 destinations across 1 country.
- Destinations
- 73
- Country
- 1
- Routes tracked
- 976
- Longest route
- 3,793 km
Busiest markets by route count
- Chicago58 routes
- Denver54 routes
- Las Vegas54 routes
- Baltimore47 routes
- Phoenix47 routes
A market may include more than one airport.
Longest route in the dataset
3,793 km great-circle distance between the two airports.
Destinations in the route data
- Chicago
- Denver
- Las Vegas
- Baltimore
- Phoenix
- Los Angeles
- Houston
- St Louis
- Orlando
- Tampa
- Nashville
- Kansas City
- Austin
- Fort Lauderdale
- Oakland
- San Diego
- Albuquerque
- Dallas
- San Antonio
- New Orleans
- Philadelphia
- Portland
- Seattle
- Atlanta
- and 49 more
Common questions about flying Southwest Airlines
What is the Southwest Airlines customer service phone number?
According to Southwest Airlines’s own website (southwest.com, checked 5 Oct 2026): +1-800-435-9792.
How many destinations does Southwest Airlines fly to?
Originfacts tracks 73 Southwest Airlines destinations across 1 country, on 976 routes.
Where is Southwest Airlines based?
Southwest Airlines is based in United States. In the Originfacts route dataset, its busiest market is Chicago, followed by Denver, Las Vegas and Baltimore.
What aircraft appear on Southwest Airlines routes?
The routes we hold name Boeing 737-300, Boeing 737-500, Boeing 737-700 and Boeing 737-800. That dataset accumulates over time, so treat it as a record of what has flown rather than a current fleet list.
What is the longest Southwest Airlines route?
Las Vegas to Providence, at 3,793 km.
Sources and verification
Baggage, fare, check-in, disruption and contact figures are published only when they are read from Southwest Airlines’s own pages or a named regulator, and each one shows the page and the date it was checked. Where sources disagree we show both and publish neither. Route and destination figures come from the Originfacts route dataset and show its date instead; they are not verified by hand.
- Carry-onNot yet verified—
- Checked bagsNot yet verified—
- Cheapest fareVerified 5 Oct 2026
- Cabins & aircraftRoute data, Jul 2026Originfacts route-network dataset, built from TravelPayouts route data
- Delays & cancellationsNot yet verified—
- Check-inVerified 4 Sep 2026
- ContactVerified 5 Oct 2026
- Where they flyRoute data, Jul 2026Originfacts route-network dataset, built from TravelPayouts route data