Southwest Airlines logo

United States

Southwest AirlinesWN

IATA Code

WN

ICAO Code

SWA

Routes

1,146

About

Southwest Airlines is the largest domestic carrier in the United States by passengers boarded. Operating an all-Boeing 737 fleet of 810 aircraft, Southwest carries over 140 million passengers annually with a point-to-point network (rather than traditional hub-and-spoke).

Southwest built its reputation on the "Bags Fly Free" policy, no change fees, and open seating. However, significant changes are coming in 2025-2026: checked bag fees now apply to most fares (effective May 28, 2025), and assigned seating replaces open boarding (January 27, 2026).

The airline operates independently with no alliance membership, focusing exclusively on the U.S., Mexico, Central America, and the Caribbean.

Hubs & Focus Cities

Airports where Southwest Airlines operates 5+ routes

+56 more hub airports

Network

95 airports served

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+45 more airports

Observed Flights

Callsigns tracked for Southwest Airlines (SWA) - 719 unique callsigns observed

Callsigns with confirmed departure and arrival airports

Showing 18 of 62 callsigns with valid routes

Baggage Policy

IMPORTANT: "Bags Fly Free" Changes (May 28, 2025)

Southwest's famous "Bags Fly Free" policy has ended for most fares. Only Choice Extra (formerly Business Select) and elite members still receive free checked bags.

Carry-On Allowance

Personal Item (free on all fares):

  • Dimensions: 16.25" × 13.5" × 8" (41 × 34 × 20 cm)
  • Must fit under the seat in front of you

Cabin Bag (free on all fares):

  • Dimensions: 24" × 16" × 10" (61 × 41 × 25 cm) including handles/wheels
  • No weight limit (must be able to lift yourself)
Fare Type Personal Item Cabin Bag
All Fares ✓ Free ✓ Free

Checked Baggage (Flights Booked After May 28, 2025)

Fare Type 1st Bag 2nd Bag Weight Limit
Basic $35 $45 50 lbs (23 kg)
Choice $35 $45 50 lbs (23 kg)
Choice Preferred $35 $45 50 lbs (23 kg)
Choice Extra FREE FREE 50 lbs (23 kg)

Who Still Gets Free Checked Bags:

  • Choice Extra fare: 2 free bags
  • A-List Preferred members: 2 free bags
  • A-List members: 1 free bag
  • Rapid Rewards credit cardmembers: 1 free bag (cardholder only)
  • Getaways by Southwest customers: 2 free bags

Overweight & Oversized Fees

Category Fee
Overweight (51-70 lbs / 24-32 kg) $150
Overweight (71-100 lbs / 33-45 kg) $200
Oversized (63-80 in / 160-203 cm) $200
Both overweight AND oversized $200 (single fee)

Special Items

Item Fee Notes
Golf clubs Standard bag fee Oversize waived up to 115 in
Skis/snowboards Standard bag fee Ski bag + boot bag = 1 item
Surfboard Standard bag fee Hawaii residents: free inter-island
Car seat FREE Gate-check available
Stroller FREE Gate-check available
Wheelchair FREE Does not count toward allowance

Fees as of January 2025. Verify at southwest.com/travel-fees.

In-Flight Experience

Seating

Aircraft Seats Pitch Width
Boeing 737-700 143 31" 17.1"
Boeing 737-800 175 32" 17.8"
Boeing 737 MAX 8 175 32" 17.8"

Open Seating (Until January 27, 2026):

  • No assigned seats—choose any open seat when boarding
  • Boarding position based on check-in time (A, B, C groups)
  • Choice Extra gets priority boarding (positions A1-A15)

Assigned Seating (Starting January 27, 2026):

  • Southwest will implement assigned seats
  • Standard pitch: 31"
  • Extra Legroom seats: 34-35" pitch available for purchase

Entertainment & WiFi

Feature Details
Seatback screens None—streaming only
Entertainment FREE via Southwest app (movies, TV, music)
WiFi cost $8 per device per flight
Free WiFi A-List Preferred, Choice Extra; ALL Rapid Rewards members FREE starting Oct 24, 2025
Free messaging iMessage, WhatsApp available without WiFi purchase

Note: Netflix, HBO Max, Zoom, and Teams are blocked due to bandwidth.

Food & Beverage

Item Details
Soft drinks Complimentary on all flights
Snacks Pretzels, cookies on flights 251+ miles; OREO on 1,550+ miles
Alcohol For purchase ($6); credit card only
Premium drinks FREE: A-List Preferred (2 per leg), Choice Extra (1 coupon)
Meals Not available—bring your own food