Southwest vs Delta 2026: The Verdict Now That Southwest Charges for Bags

I have flown both Southwest and Delta more times than I can count, and the version of this comparison I would have written two years ago is very different from the one I would write today. Southwest ended its bags-fly-free era in May 2025. It added assigned seating in January 2026. Delta in the same stretch quietly reshuffled its economy cabin into three tiers and raised bag fees twice. If you are reading old comparisons from 2023, throw them out. The 2026 landscape looks different.

Here is the short version. For pure US domestic travel, Southwest is still the better default for most budget-to-mid-range travelers, mostly because of the Companion Pass and a lower cancellation rate that has stayed remarkably consistent through years of industry chaos. For anything premium, international, or schedule-critical, Delta wins and it is not especially close. Which one you should actually book depends on which of those descriptions fits your next trip, and the honest answer for a lot of people is “both, depending on the trip.”

Everything below is the long version: the side-by-side on bags, seats, performance, routes, loyalty, and cost, plus the three or four places where the right answer is not what you would assume.

What We Looked For

A comparison is only useful if the criteria match what you actually care about. Here is what we weighted:

• Baggage, because bag fees have jumped twice in 2026 and the rules now matter more than they used to
• Seat comfort in paid economy, not just premium cabins, since that is what most people actually fly
• On-time and cancellation performance, with the distinction between the two since they are not the same signal
• Route network, both domestic reach and international options
• Loyalty program value, specifically for the 4-to-10-trips-a-year flyer, not the mileage-running road warrior
• Total trip cost, bag fees and seat-selection fees included, since fare pages rarely show those

Which airline charges less for bags, Southwest or Delta?

Both now charge $45/$55 for checked bags, ending Southwest’s free-bag advantage. Southwest still allows a larger carry-on at 24x16x10 versus Delta’s 22x14x9.

This is where the most changed. For years, Southwest’s bags-fly-free policy was the single biggest reason to book Southwest over anyone else. That era ended in May 2025. Then fees went up again in April 2026. As of this writing, Southwest charges $45 for the first checked bag and $55 for the second on standard Wanna Get Away fares, which is the same as Delta’s Main Cabin fees.

The difference now lives in the fine print. Southwest’s carry-on limit is 24 x 16 x 10 inches, which is genuinely generous, noticeably larger than Delta’s 22 x 14 x 9-inch limit. If you pack a carry-on that sits in the grey zone between “overly optimistic” and “legal,” Southwest is the more forgiving airline to fly it on. Southwest also has one of the lowest mishandled-bag rates in the industry (0.40 percent) versus Delta’s 0.46 percent, which is not a huge gap but adds up over many trips with checked luggage.

Where Delta wins on bags is the credit card pooling math. The Delta SkyMiles Gold American Express waives the first checked bag for the cardholder plus up to eight companions on the same reservation. Southwest’s Rapid Rewards Plus card does the same thing with the same 8-companion pool, but the Southwest network is smaller, so if your group fly Delta more than they fly Southwest, the Delta card plays better.

Basic Economy is where Delta quietly pulls ahead, though. Delta includes a full-size carry-on plus a personal item on every fare, even Basic Economy. Most other US airlines restrict carry-ons on their cheapest fares. Southwest does not sell a Basic Economy fare in the traditional sense, so there is no direct head-to-head here, but if you are comparison shopping between Southwest’s cheapest fare and Delta Basic Economy, Delta Basic is the friendlier product on bags.

Winner: unpaid-fare carry-on

Southwest / by a generous inch in every dimension

Winner: credit-card bag pooling

Effectively a tie / Delta has more routes

Winner: mishandled bags

Southwest / narrowly

Does Southwest or Delta have more legroom?

Southwest’s standard economy is 31 inches of pitch versus Delta’s 30 to 31. Both airlines now sell a 34-inch upgrade tier; the unpaid-economy gap that defined Southwest for years has effectively closed.

Southwest’s standard pitch is 31 inches as of January 27, 2026, down from 32 to make room for the new Extra Legroom rows. Delta Main Cabin sits at 30 to 31 inches on most aircraft. That is within an inch of each other in unpaid economy, and the long-running shorthand of “fly Southwest for the leg space” has materially weakened in the last twelve months.

Delta’s tiered upgrade menu has been there for years. Comfort Plus gets you 34 inches of pitch and priority boarding for roughly $30 to $80 each way depending on route. Delta’s newer Comfort Basic category is a middle-tier product with a few extra inches over Main Cabin, pitched at travelers who want a little more room without the full Comfort Plus price.

Southwest now has its own answer. Extra Legroom seats sit at the front of the cabin and near the exit rows at 34 inches of pitch, with three to five additional inches over Standard. Roughly one in three seats on a 737 falls into the Extra Legroom category. It is not a separate cabin like Comfort Plus (no priority boarding bundled, no upgraded snack), but the legroom number is the same. Preferred seats further forward in Standard pitch, plus Extra Legroom rows, are now sold as paid upgrades at booking. The free-for-all boarding process became assigned seating on January 27, 2026, and the only thing genuinely lost was the small game of “how early can I check in to get A-group boarding.” If you are also considering JetBlue as a Southwest alternative, our JetBlue vs Southwest comparison covers the in-flight product and premium cabin differences.

Wi-Fi and entertainment is where Delta clearly pulls ahead. Delta Sync is included free on most domestic flights, with free texting and streaming once you are a T-Mobile or Delta member. Southwest offers free messaging and paid Wi-Fi at $8 per device per day. Not awful, but not free either.

Winner: standard economy pitch

Tie / 31 vs 30-31 inches

Winner: paid extra-legroom upgrade

Tie / both at 34 inches; Comfort Plus bundles priority boarding

Winner: in-flight connectivity

Delta / Delta Sync is free on most domestic

Is Southwest or Delta more reliable for flights in 2026?

Delta edges ahead on on-time arrivals at 80% versus Southwest’s 80%, but Southwest cancels far fewer flights at 0.82% versus Delta’s 1.37%.

Numbers first. Delta’s 2025 on-time arrival rate was 80.27 percent. Southwest’s was 79.92 percent. Delta was named Cirium’s Most On-Time North America Airline in 2025 for the fifth consecutive year. On pure arrival punctuality, Delta has the edge.

But the more interesting number is cancellations. Southwest’s cancellation rate is 0.82 percent. Delta’s is 1.37 percent. That is close to double. If you are flying a schedule where a cancellation would ruin the trip (a wedding, a cruise connection, a single-day work event), Southwest is slightly less likely to strand you, even if it is slightly more likely to be late on arrival.

The 2022 Southwest holiday meltdown is probably still in some readers’ minds. That incident was real, it was bad, and Southwest has since invested heavily in crew-scheduling infrastructure. The data since then has been competitive with or better than its peers. It is fair to be cautious. It is not fair to assume Southwest is systemically unreliable at this point.

Winner: on-time arrivals

Delta

Winner: cancellations

Southwest

Winner: getting your bag back with you

Southwest / slightly

Does Delta or Southwest fly to more destinations?

Delta flies to over 300 destinations across six continents. Southwest covers about 120 US airports with limited international service, so Delta wins by a factor of three.

This one is not close. Delta operates over 300 destinations across six continents and is a SkyTeam founding member, which means you can connect to Air France, KLM, Virgin Atlantic, Korean Air, and a long list of other partners using SkyMiles. If your travel involves Europe, Asia, or complex multi-city international itineraries, Delta is a different sport than Southwest.

Southwest operates the largest domestic network in the US with over 120 destinations, plus a handful in Mexico, Central America, and the Caribbean. Within that footprint, Southwest is often the cheapest way to get between two mid-sized US cities, especially if you are flying on shorter notice. Southwest’s domestic coverage inside California and between California and the rest of the country is especially strong.

The practical way to think about this: if you fly mostly within 2,500 miles and mostly inside the US, Southwest’s network probably covers 90 percent of your trips. If your trip list includes Asia, Europe, or anything that requires two connections through international hubs, Delta will be the default.

Winner: pure domestic coverage within the US

Southwest

Winner: international and premium-cabin reach

Delta / by a factor of 3x on destinations alone

Is Rapid Rewards or SkyMiles the better loyalty program?

Rapid Rewards returns more per dollar spent and includes the Companion Pass, the best domestic loyalty perk in US aviation. SkyMiles wins for international redemptions through SkyTeam.

Rapid Rewards returns about 7.8 percent on base spending. SkyMiles returns about 6 percent. The gap is real and persistent, and it shows up fastest on domestic trips. A $400 Southwest round trip earns about 31 Rapid Rewards dollars in flight value; a $400 Delta round trip earns about 24 SkyMiles dollars worth of miles.

Rapid Rewards also has one feature SkyMiles cannot match: the Companion Pass. Fly enough in a calendar year (currently 125,000 qualifying points or 100 one-way flights) and for the rest of that year and the next full year, one designated companion can fly with you for free on any Southwest flight, paying only taxes and fees. If you are married, partnered, or have a regular travel buddy, this is the single best loyalty perk in US domestic aviation. Nothing Delta offers is in the same category of value.

Delta’s answer lies in elite tier benefits at the top. Diamond Medallion gets you complimentary upgrades to premium cabins, priority service, and a generous Choice Benefit allowance. If you fly 125,000+ miles annually and want first-class upgrades as a regular occurrence, Delta has the product. If you are a 10-to-25-trips-a-year flyer, the top-tier benefits are mostly aspirational and Rapid Rewards’ simpler model returns more for you.

SkyMiles also opens access to SkyTeam for redemptions. That means you can use miles on Air France flights to Paris, Virgin Atlantic to London, or Korean Air to Seoul. Rapid Rewards redeems only for Southwest flights, which is a meaningful limit if you ever want to use points for international travel.

Winner: casual flyer return on spend

Southwest Rapid Rewards

Winner: companion travel

Southwest / by a mile. The Companion Pass is unique

Winner: elite status chase

Delta / more tiers and real premium cabin access

Winner: international redemption

Delta / through SkyTeam access

Is Southwest or Delta cheaper when you add all the fees?

Total trip costs are usually within $30 on the same route after bag fees. Southwest saves money on changes and cancellations, while Delta sometimes wins on last-minute fares.

Fare-only comparisons are the wrong comparison. What actually matters is total cost: fare plus bags plus seats plus any upgrades.

On a typical round trip with one checked bag and no seat upgrade, Southwest and Delta are usually within $30 of each other once bag fees are included, as of April 2026. Before May 2025 this was not true (Southwest had a clear ~$70 advantage on a typical trip with two bags). That structural edge is gone.

Where Southwest still wins on cost: flexible cancellation. Wanna Get Away fares return the money as travel credit with no change or cancellation fee, usable within 12 months. Delta Main Cabin tickets generally allow changes without a fee within the 24-hour grace period, but cancellations outside that window return credit that may come with a service fee depending on the fare class. For spontaneous bookers or anyone whose plans shift, Southwest’s flexibility is worth real money even when the fares are similar.

Where Delta wins on cost: booking timing. Delta’s schedule flexibility and broader international routing often means there is at least one reasonable fare-vs-schedule option, even close to departure. Southwest is more concentrated in peak windows, so on short-notice last-minute travel, Delta sometimes has the cheaper or better option simply because they have more flights.

Who Should Pick Southwest

• You mostly fly within the US
• You travel with a partner or kid often enough that the Companion Pass math works
• You value being almost-never-cancelled over being always-on-time-to-the-minute
• You pack a carry-on that lives in the zone of airline interpretation
• You want a simple loyalty program with no blackout dates
• You hold the Rapid Rewards Plus credit card already

Who Should Pick Delta

• You fly internationally more than twice a year
• You want to use miles for premium cabin redemptions, including partner airlines
• You care about Wi-Fi and in-flight entertainment as part of the product
• You are working toward elite status and plan to actually hit it
• You need schedule flexibility on short-notice business trips
• You book a lot of last-minute flights where Delta’s larger schedule is an advantage
• You fly through a Delta hub (Atlanta, Detroit, Minneapolis, Salt Lake City, JFK, Seattle, LAX, Boston)

The Bottom Line

If you fly both airlines now and are wondering whether to consolidate on one, the answer depends on what bugs you more about your current mix. If bag fees and getting stranded are the thing that stresses you out, consolidate on Southwest. If legroom, Wi-Fi, and the lack of international option are the thing that stresses you out, consolidate on Delta. And if you are deciding between Southwest and American instead, our American vs Southwest comparison covers that matchup, where the reliability gap is even wider.

If you are booking a single trip and just want to know which airline wins today, the answer is honestly “check the actual schedule and price” rather than defaulting to either. The gap between the two has narrowed in 2026. Both are credible choices for most domestic itineraries, with the tiebreaker being international reach (Delta) vs companion travel and cancellation reliability (Southwest).

The old playbook of “Southwest is the cheap one and Delta is the nice one” stopped being true sometime in 2024. They are now competing for similar travelers at similar price points, and which one is right for you comes down to the specifics of how you fly. Read the specs, check the route, and pick the one whose strengths match your trip. Ignore the tribal loyalty. Both airlines are pretty good at the thing they do.