Southwest Airlines — Complete Airline Guide 2026
Dallas, Texas · Founded 1971 · None (independent)
Southwest Airlines is the world's largest low-cost carrier and the largest domestic airline in the United States by passengers carried. Famous for its no-frills, customer-friendly approach, Southwest operates an all-Boeing 737 fleet and is known for open seating (no assigned seats), free checked bags, no change fees, and a fun company culture. The airline serves over 120 destinations across the U.S., Mexico, the Caribbean, and Central America.
Southwest Hub Airports
Southwest Airlines operates from 6 hub airports and 4 focus cities across the United States:
Southwest Terminal Locations at U.S. Airports
Find which terminal Southwest Airlines uses at airports across the U.S. Click the airport code to see the full airport guide with maps, dining, and more.
| Code | Airport | Terminal | Gates |
|---|---|---|---|
| ATL | Atlanta | Domestic Terminal — Concourse T | T1–T14 |
| BWI | Baltimore/Washington | Concourse A, Concourse B | A1–A12, B1–B12 |
| CLT | Charlotte | Concourse E | E1–E39 |
| DCA | Washington National | Terminal C (New) | C39–C59 |
| DEN | Denver | Concourse B | B17–B92 |
| DTW | Detroit | North Terminal | Gates 1–28 |
| EWR | Newark | Terminal B | B1–B20 |
| FLL | Fort Lauderdale | Terminal 1 | Gates 1–14 |
| HNL | Honolulu | Terminal 2 (Lobby 5–8) | Gates 31–60 |
| IAD | Washington Dulles | Concourse C/D | C1–C22, D1–D28 |
| IAH | Houston Intercontinental | Terminal E | E1–E24 |
| LAS | Las Vegas | Terminal 1 (Gates A, B, C, D) | A1–A19, B1–B26, C1–C24, D1–D46 |
| LAX | Los Angeles | Terminal 1 | Gates 1–18 |
| LGA | New York LaGuardia | Terminal B (New) | Concourses 1–4 |
| MCO | Orlando | South Terminal (Gates 70–129) | Gates 70–129 |
| MDW | Chicago Midway | Main Terminal (Concourses A, B, C) | A1–A18, B1–B22, C1–C10 |
| MSP | Minneapolis | Terminal 2 — Humphrey | G1–G12 |
| PDX | Portland | Concourse C | C1–C12 |
| PHL | Philadelphia | Terminal E | E1–E12 |
| PHX | Phoenix | Terminal 3 | Gates 1–20 |
| SAN | San Diego | Terminal 1 (New) | Gates 1–30 |
| SFO | San Francisco | Terminal 1 (Boarding Areas B & C) | B2–B24, C1–C10 |
| SLC | Salt Lake City | Concourse B | B1–B28 |
| TPA | Tampa | Airside C | C40–C55 |
Southwest Baggage Policy & Fees
Here's what Southwest Airlines charges for baggage. Fees may vary by route, fare class, and elite status. Always confirm on Southwest Airlines's website ↗.
Baggage Policy
Southwest Check-In Tips
Check-in opens exactly 24 hours before departure — timing matters because Southwest uses open seating (boarding groups A, B, C assigned at check-in). Earlier check-in = better boarding position. EarlyBird Check-In (paid add-on) automatically checks you in 36 hours before departure for a better position.
Rapid Rewards — Southwest's Frequent Flyer Program
Rapid Rewards members earn points on flights and Rapid Rewards credit cards (Chase partnership). There are no blackout dates — any seat available for purchase can be booked with points. Elite tiers: A-List and A-List Preferred offer priority boarding, bonus points, and free standby changes.
Frequently Asked Questions
Does Southwest Airlines charge for checked bags?
No — Southwest is famous for including two free checked bags with every ticket, plus a carry-on and personal item. This is unique among major U.S. airlines and can save $70+ round trip compared to competitors.
How does Southwest seating work?
Southwest uses open seating — there are no assigned seats. At check-in (24 hours before departure), you receive a boarding group (A, B, or C) and position number. You board in that order and choose any available seat. Check in as close to 24 hours as possible for a better position.
Does Southwest fly to international destinations?
Yes, Southwest serves destinations in Mexico, the Caribbean, and Central America including Cancun, Cabo San Lucas, Havana, Nassau, Aruba, and others in addition to its extensive U.S. network.
Can I change or cancel a Southwest flight?
Southwest has no change fees — you can change or cancel any ticket for free. Refundable fares (Business Select, Anytime) get cash refunds. Non-refundable (Wanna Get Away) fares receive travel credit valid for 12 months.