Introduction

Picking between Southwest and Delta isn't a contest of which airline is better. It's a question of which one fits how you actually fly. Southwest built its program around domestic flexibility, simple fares, and the Companion Pass. Delta built its around international reach, premium cabins, and elite status that rewards heavy spend.

Both airlines changed materially in the last 18 months. Southwest ended its decades-long "two bags fly free" policy on May 28, 2025, replacing it with a tiered system that charges most non-elite passengers for checked bags. Delta moved its Medallion program to a spend-only qualification system in 2024 and held those thresholds steady for 2026 status. As of May 2026, the right answer depends on your home airport, your travel mix, and how often you pull out a credit card versus a boarding pass.

Quick Answer

Choose Southwest if you fly mostly domestic routes, hold (or plan to hold) a Southwest co-branded credit card to preserve the first-bag-free perk, want to earn the Southwest Companion Pass, or fly out of a Southwest stronghold like Denver, Dallas Love Field, Phoenix, Las Vegas, Chicago Midway, or Baltimore.

Choose Delta if you fly internationally, want premium cabin options like Delta One or first class, prefer assigned seating, live near a Delta hub (Atlanta, Minneapolis, Detroit, Seattle, JFK, Salt Lake City, LAX), or value SkyTeam partnerships with Air France-KLM, Korean Air, and Virgin Atlantic.

Route Networks

Southwest's Domestic Network

Southwest serves roughly 120 destinations and operates the largest domestic schedule in the United States. The carrier runs a point-to-point model, which means it concentrates capacity in markets other airlines underserve and skips the funnel-everything-through-a-hub approach.

Southwest's strongest markets in May 2026 include Denver (the busiest station in the system), Dallas Love Field, Phoenix Sky Harbor, Las Vegas Harry Reid, Chicago Midway, Baltimore/Washington, Houston Hobby, Nashville, and Orlando. International service stays limited to Mexico, Central America, and the Caribbean. If your trip list looks like Boston to Fort Lauderdale, Chicago to Nashville, or Phoenix to San Diego, Southwest typically offers multiple daily nonstops.

Delta's Global Network

Delta serves over 300 destinations across six continents and is the U.S. partner anchor of the SkyTeam alliance. Atlanta remains the world's busiest airport and the center of Delta's network, with Minneapolis, Detroit, Seattle, JFK, and Salt Lake City rounding out the hub map.

The international advantage is where Delta separates itself. Direct service to Paris, Amsterdam, London, Tokyo, Seoul, and São Paulo, plus connections via Air France-KLM and Virgin Atlantic into the rest of Europe, give Delta a route map Southwest can't approach.

What This Means for You

The deciding factor is your home airport. Atlanta makes Delta nearly automatic. Phoenix, Denver, or Midway tilt the math toward Southwest. Pull up your last 12 months of trips and check which airline operated nonstops to the destinations you actually visit. That's the answer, not any abstract ranking.

Baggage Policies in 2026

This is the section that changed most. The old "Bags Fly Free" framing no longer applies to most Southwest passengers.

Southwest Baggage (Post-May 28, 2025)

Southwest now charges general passengers $35 for the first checked bag and $45 for the second. Carry-ons and personal items remain free. The free-bag benefit survives for specific groups: A-List members and Rapid Rewards credit cardholders get one free checked bag; A-List Preferred members, Business Select, and Choice Extra fares get two.

If you hold a Southwest Rapid Rewards Plus, Premier, or Priority card, the first-bag perk effectively offsets a roundtrip's worth of fees. For families, the credit card benefit usually covers only the primary cardholder, so model the math carefully before assuming the old "family of four flies with eight free bags" calculation still holds. It doesn't.

Delta Baggage

Delta's structure has stayed steady: $35 for the first checked bag and $45 for the second on domestic Main Cabin fares, with the first bag free on most international routes. Delta SkyMiles cardholders get one free checked bag on domestic flights, and Medallion elites get free bags by tier. Functionally, a Delta SkyMiles Gold cardholder and a Southwest Rapid Rewards cardholder now pay the same checked-bag rate of zero on the first bag, which is a meaningful equalizer compared to the pre-2025 era.

Change and Cancellation Policies

Southwest

Southwest never charged change fees, and that policy survives all the other 2025 program changes. Any Southwest fare can be canceled or changed up to 10 minutes before departure. Wanna Get Away funds remain valid for 12 months; Anytime and Business Select fares are fully refundable.

Delta

Delta eliminated change fees on domestic Main Cabin and higher fares back in 2020. Basic Economy is still locked down: no changes or cancellations outside the 24-hour grace period, and the fare class auto-assigns seats. Same-day confirmed flight changes run $75 for non-elites and are waived for Medallion members.

Functionally, if you avoid Basic Economy, Delta and Southwest now offer comparable flexibility. The gap exists, but it's narrower than the legacy reputation suggests.

Seat Selection and Boarding

Southwest still uses open seating. You check in 24 hours before departure (or pay $15-25 for EarlyBird), receive a boarding position in group A, B, or C, and pick any available seat when you board. Families with children six and under board after group A.

Delta assigns seats at booking. Main Cabin passengers select free seats during purchase, Preferred seats run $15-79 per segment, and Basic Economy passengers get whatever's left at check-in. Medallion elites and premium cabin passengers receive free Preferred seat selection.

Neither system is objectively better. Open seating gives flexibility and a faster boarding process; assigned seating gives certainty. Pick the one that matches how you travel.

Loyalty Programs

Southwest Rapid Rewards

Rapid Rewards is a revenue-based program: points earned and points required for redemptions scale with the cash fare. Earning rates run 6x on Business Select, 10x on Anytime, and 12x on Wanna Get Away Plus. Co-branded credit cards earn 2-3x on Southwest spending.

Redemptions hold steady around 1.3 cents per point with no blackout dates. Award seats are available whenever cash seats exist, which is one of the cleanest features of any U.S. airline program.

The signature perk remains the Companion Pass. Earn 135,000 qualifying points in a calendar year (the threshold has been unchanged since 2023 and remains current for May 2026) and a designated companion flies free on every Southwest flight you book for the rest of that year plus all of the following year. Co-branded cardholders receive a 10,000-point boost, which functionally drops the requirement to 125,000.

Delta SkyMiles

SkyMiles moved to dynamic pricing years ago. Earning rates: 5 miles per dollar on Delta flights in Main Cabin or below, 10 miles per dollar in First Class or Delta One. Medallion elites add a bonus on top. Co-branded American Express cards earn 1-3 miles per dollar.

Redemption value varies widely. Domestic economy awards often clear at under 1 cent per mile, which is the floor of usefulness. Premium cabin international awards via SkyTeam partners can hit 1.5-2 cents per mile or better. The variance is real, and treating SkyMiles like a flexible currency requires watching for the sweet spots.

Credit Cards

Southwest Cards (Chase)

Three personal cards earn Rapid Rewards points that count toward Companion Pass qualification: the Southwest Rapid Rewards Plus ($69 annual fee, 3,000 anniversary points), the Southwest Rapid Rewards Premier ($99 annual fee, 6,000 anniversary points), and the Southwest Rapid Rewards Priority ($149 annual fee, 7,500 anniversary points, $75 annual Southwest travel credit, four upgraded boardings per year).

All three earn 2x on Southwest purchases and include the first-checked-bag benefit, which materially shifts the value calculation after the 2025 baggage changes. Confirm current welcome offers on the application page before applying.

Delta Cards (American Express)

The Delta SkyMiles Gold (annual fee waived first year, then $150) includes a free first checked bag, priority boarding, and 2x on Delta purchases. The Delta SkyMiles Platinum ($350 annual fee) adds an annual Companion Certificate (pay $75 plus taxes), domestic Main Cabin upgrades, and a $2,500 MQD Headstart toward Medallion status. The Delta SkyMiles Reserve ($650 annual fee) layers on Sky Club access for cardholder plus two guests, a First-Class-eligible Companion Certificate, domestic First Class upgrades, and the same $2,500 MQD Headstart.

The MQD Headstart matters more under the 2024 Medallion overhaul, since credit card spending no longer earns MQMs. The Headstart is the only meaningful card-side accelerator toward elite status.

Premium Cabin

Southwest operates a single-class configuration system-wide. Business Select buys priority boarding (positions A1-A15), bonus Rapid Rewards points, and free premium drinks, but the seat is identical. If you want a wider seat, lie-flat bed, or onboard meal service, Southwest doesn't sell it.

Delta operates three meaningfully different cabin products: Delta Comfort+ (extra legroom, free beer and wine, priority boarding), domestic First Class (wider leather seats, 36+ inches of pitch, included meals on longer flights), and Delta One (lie-flat seats, direct aisle access, multi-course dining, available on widebody international and select transcon routes). Delta One in particular is the product travelers chase with SkyMiles redemptions, and where the program's variable pricing finally works in your favor.

Elite Status

Southwest A-List and A-List Preferred

Southwest's elite tiers are simple: A-List (35,000 tier qualifying points or 25 qualifying one-way flights) and A-List Preferred (70,000 tier qualifying points or 50 qualifying one-way flights). A-List delivers guaranteed A1-A15 boarding, a 25% earning bonus, free same-day flight changes, and free first checked bag. A-List Preferred adds free inflight Wi-Fi, a 100% earning bonus, and a second free checked bag.

No upgrades, no lounge access, no surprise tiers. The structure matches the airline.

Delta Medallion (2024 Spend-Based Overhaul)

Delta moved to MQDs only in 2024 and held the thresholds steady for 2026 qualification:

  • Silver Medallion: $3,000 MQDs
  • Gold Medallion: $6,000 MQDs
  • Platinum Medallion: $9,000 MQDs
  • Diamond Medallion: $15,000 MQDs

You earn 1 MQD per dollar of eligible Delta fare (base fare plus carrier-imposed surcharges, government taxes excluded). The legacy Medallion Qualifying Miles and Medallion Qualifying Segments tracks were eliminated entirely in 2024 and are not coming back. The Delta SkyMiles Platinum, Platinum Business, Reserve, and Reserve Business cards include a $2,500 MQD Headstart each year, which is the practical way most non-frequent flyers chip away at Silver or Gold.

Medallion benefits scale with tier: free checked bags, Comfort+ and First Class complimentary upgrades (subject to availability and tier priority), Choice Benefits at Platinum and Diamond (Global Upgrade Certificates, Sky Club Executive memberships, or bonus miles), and free Sky Club access at Diamond.

Operational Reliability

Both carriers rank near the top of U.S. airlines for on-time performance. Delta invests heavily in its operations center and historically posts on-time rates in the low- to mid-80s. Southwest, after rebuilding its crew-scheduling technology following the 2022 holiday-season disruption, has posted on-time numbers in the high 70s through 2025. Delta still holds a small edge in the published rankings, but neither airline is the operational outlier it was in the early 2020s.

Airport Lounges

Southwest operates no proprietary lounges. The model doesn't include them, and no Southwest fare or elite tier grants lounge access. A separate Priority Pass membership via a premium travel credit card is the workaround.

Delta operates over 50 Sky Clubs in the U.S. plus partner access internationally. Sky Club access comes via Delta SkyMiles Reserve (cardholder plus two guests, subject to current visit caps), Diamond Medallion status, a same-day Delta One ticket, or a $695 annual standalone membership. The product quality varies, with flagship clubs at JFK Terminal 4, Atlanta Concourse F, and LAX Terminal 3 noticeably better than smaller domestic locations.

Who Each Airline Fits Best

Domestic Leisure Travelers

Southwest, especially if you hold one of the co-branded cards to preserve the first-bag benefit and want to chase the Companion Pass. The pricing is transparent, the change policy is unmatched, and the network covers the destinations leisure travelers actually fly to.

International Travelers

Delta. Southwest doesn't fly to Europe, Asia, or Africa. Delta does, with SkyTeam partners filling in everywhere else. Premium cabin redemptions via SkyMiles on Air France, KLM, Korean Air, and Virgin Atlantic also deliver better value than domestic SkyMiles redemptions.

Families

This used to be a clean Southwest win. With the 2025 baggage change, the calculation depends on whether you hold a Southwest credit card. Even one Rapid Rewards card in the family gets the cardholder one free checked bag, which helps but doesn't fully restore the old math. Southwest still wins on flexibility (free changes, no Basic Economy equivalent) and on Companion Pass economics for families that travel together regularly.

Premium Cabin Travelers

Delta. Southwest doesn't compete here.

Points and Miles Maximizers

Both, used strategically. Southwest's Companion Pass remains the most valuable single perk in U.S. domestic loyalty programs for the right user. Delta's SkyMiles work best as a top-up for international premium cabin redemptions, particularly using SkyTeam partners. Pairing Chase Ultimate Rewards with Southwest cards on one side and Amex Membership Rewards with Delta cards on the other is the standard build.

Making the Call

Run the honest test. Look at your last year of trips and ask where you actually flew, which airline operated nonstops to those destinations, how many bags you checked, whether you redeemed points or paid cash, and whether you flew internationally even once.

If most trips were domestic, your home airport favors Southwest, and you'd hold a Rapid Rewards card to preserve the bag benefit, Southwest is the better anchor. If even one trip per year is international, your home airport favors Delta, or you value premium cabins, Delta is the better anchor.

Most travelers don't need to pick one airline exclusively. Anchor with one carrier for the loyalty benefits while staying willing to switch when a specific route or fare argues otherwise. Loyalty makes sense up to the point where it starts costing you.

For deeper reading on each program's mechanics, see our breakdowns of Southwest Rapid Rewards, Delta SkyMiles, and the best Delta credit cards for matching the right card to your travel patterns.

This article contains affiliate links. If you apply through our links, we may earn a commission at no cost to you, which helps us continue sharing points and miles strategies with the community.

Some of the links in this article are affiliate links. We may receive a small commission at no extra cost to you if you apply through these links. This helps us keep the site running and continue creating free content.