If you’re planning your next trip, southwest airlines book a flight is one of the most searched travel topics in 2026—and for good reason. Southwest Airlines has introduced several major changes over the past year, including new fare bundles, assigned seating, updated baggage policies, and enhanced booking options. Whether you’re traveling for business, a family vacation, or a weekend getaway, understanding how the airline’s booking system works can help you save money and avoid surprises.
This guide covers everything you need to know before booking a Southwest Airlines flight in 2026.
Key Points Summary
╔════════════════════════════════════════════════════════════════════╗
║ – Southwest Airlines now offers Basic, Choice, Choice Preferred, ║
║ and Choice Extra fare bundles. ║
║ – Assigned seating officially applies to flights from January 27, ║
║ 2026 onward. ║
║ – Basic fares include the lowest prices but come with the most ║
║ restrictions. ║
║ – Checked baggage is no longer free for most travelers, though ║
║ premium fares and eligible members receive baggage benefits. ║
║ – Booking early, using the Low Fare Calendar, and monitoring fare ║
║ changes can help travelers save money. ║
╚════════════════════════════════════════════════════════════════════╝What Is Southwest Airlines?
Southwest Airlines is one of America’s largest domestic airlines, serving more than 100 destinations across the United States, Mexico, Central America, and the Caribbean. Known for its customer-friendly policies and extensive domestic network, the airline has evolved significantly in 2025 and 2026.
While Southwest was once famous for open seating and two free checked bags, today’s travel experience includes assigned seating, new fare categories, premium seating options, and updated baggage rules.
How to Book a Southwest Airlines Flight
Booking a Southwest Airlines flight is straightforward.
1. Search for Flights
Enter:
- Departure city
- Destination
- Travel dates
- Number of passengers
Flexible travelers can use the Low Fare Calendar to compare prices across an entire month.
2. Compare Available Fare Bundles
Southwest now offers four primary fare options.
Basic
Ideal for travelers focused on the lowest price.
Features include:
- Lowest available fare
- Assigned standard seat at check-in
- Last boarding group
- Limited flexibility
- Checked bag fees apply
Choice
Offers additional flexibility.
Benefits include:
- Seat selection
- General boarding
- Flight credits
- Same-day standby eligibility
- More Rapid Rewards points than Basic
Choice Preferred
Adds premium travel benefits such as:
- Earlier boarding
- Preferred seating
- Greater flexibility
- Additional rewards earning
Choice Extra
The highest standard fare includes:
- Extra legroom seating
- Priority boarding
- Premium snacks on eligible flights
- Complimentary premium beverages on qualifying routes
- Two free checked bags
Assigned Seating Has Arrived
Beginning with travel on or after January 27, 2026, Southwest officially transitioned away from its long-standing open seating model.
Travelers now receive assigned seats depending on their purchased fare.
Premium fares receive earlier seat selection opportunities, while Basic customers receive seats assigned during check-in.
This represents one of the biggest operational changes in Southwest’s history.
Southwest Airlines Baggage Rules in 2026
The airline’s baggage policy has changed substantially.
Carry-on Bags
Passengers may still bring:
- One carry-on bag
- One personal item
These remain included with all fare types.
Checked Bags
Most passengers now pay checked baggage fees.
Typical fees include:
- First checked bag
- Second checked bag
Free checked baggage is generally available for:
- Choice Extra passengers
- Rapid Rewards A-List Preferred members
- Certain elite travelers
- Eligible Southwest credit card holders (first bag)
Always review current baggage allowances before completing your booking.
How to Find Cheap Southwest Flights
Finding lower fares often comes down to timing.
Helpful strategies include:
- Book several weeks in advance.
- Travel during mid-week.
- Avoid major holidays.
- Compare nearby airports.
- Use the Low Fare Calendar.
- Check fares regularly after booking if your fare allows changes.
- Redeem Rapid Rewards points when award pricing is favorable.
Rapid Rewards Program
Southwest’s loyalty program continues to provide value for frequent travelers.
Members can:
- Earn points on eligible purchases
- Redeem points for flights
- Access promotions
- Qualify for A-List status
- Work toward Companion Pass eligibility
Different fare bundles earn points at different rates.
Can You Change or Cancel a Flight?
Southwest remains more flexible than many airlines.
Depending on the fare purchased:
- Many fares have no cancellation fee.
- Travelers may receive travel credits.
- Higher fare bundles allow same-day flight changes.
- Basic fares have more restrictions and shorter flight-credit validity.
Always cancel before departure if your plans change.
Seat Selection Explained
Unlike previous years, passengers can now choose seats based on fare type.
Available seat categories include:
- Standard seats
- Preferred seats
- Extra Legroom seats
Premium fares receive earlier access to the best available seating.
Who Should Buy Basic?
Basic works well for:
- Short weekend trips
- Travelers with fixed plans
- Carry-on-only passengers
- Budget-conscious flyers
However, travelers expecting schedule changes may benefit from upgrading to Choice or higher.
Business Travelers
Frequent business travelers often choose Choice Preferred or Choice Extra because these fares provide:
- Faster boarding
- Better seat selection
- Greater flexibility
- Premium onboard experience
- Easier same-day travel changes
Family Travel
Families may prefer Choice fares because they offer better seating flexibility.
For children under 13, Southwest works to seat at least one accompanying adult next to the child whenever possible.
International Flights
Southwest serves numerous international destinations, including:
- Mexico
- Jamaica
- Aruba
- Belize
- Costa Rica
- The Bahamas
- Dominican Republic
- Turks and Caicos
- Cayman Islands
Travelers should verify passport validity and destination-specific entry requirements before departure.
Tips Before Booking
Before purchasing your ticket:
- Compare all fare bundles.
- Review baggage costs.
- Consider seat preferences.
- Join Rapid Rewards before booking.
- Double-check travel dates.
- Review cancellation rules.
- Purchase only the flexibility you need.
Common Booking Mistakes to Avoid
Many travelers unintentionally spend more by making avoidable mistakes.
Common examples include:
- Booking the wrong airport.
- Ignoring baggage fees.
- Choosing Basic without understanding restrictions.
- Waiting until the last minute.
- Not checking fare differences.
- Forgetting to add Rapid Rewards information.
What’s New for Southwest in 2026?
Southwest’s passenger experience looks noticeably different than it did just a few years ago.
Major changes include:
- Assigned seating replacing open seating.
- Four new fare bundles.
- Premium seating options.
- Updated baggage pricing.
- Enhanced booking flexibility on higher fares.
- Expanded premium travel experience for Choice Extra customers.
These changes bring Southwest closer to the offerings of other major U.S. airlines while retaining many of its customer-friendly policies.
Final Thoughts
Southwest Airlines remains a popular choice for millions of travelers thanks to its extensive route network, straightforward booking process, and flexible fare options. Although the airline has introduced assigned seating and baggage fees for many passengers, travelers who understand the new fare structure can still find excellent value. Choosing the right fare, booking early, and taking advantage of loyalty benefits can make your trip smoother and more affordable.
Planning to fly with Southwest soon? Share your travel tips or questions in the comments, and stay tuned for the latest airline news, fare updates, and booking guides.