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Southwest Airlines carries travelers across the United States and to nearby international destinations. Passenger revenue accounts for most of its business. Travelers mainly book through Southwest.com and its app, usually paying before they fly. They choose fares with different benefits and restrictions, and can pay for extra-legroom seats; most fare products also carry checked-bag fees. Southwest additionally earns revenue through Rapid Rewards and its Chase co-branded credit-card agreement.
Its network emphasizes direct flights between cities rather than routing most passengers through a few central hubs. The fleet consists entirely of Boeing 737 aircraft, simplifying maintenance, training and scheduling but making Southwest dependent on Boeing for aircraft deliveries. Delivery of the newer 737-7 requires Federal Aviation Administration certification and approvals.
The business depends on passenger demand and the fares travelers will pay, because many flight costs remain even when seats go empty. Labor is its largest operating expense, followed by fuel. Airport capacity and federal aviation restrictions also limit where and how much it can fly.
The risk section is the longest, dullest part of the filing. This keeps only what can really hurt you: where it hits, how hard, when it plays out.
Every company claims an edge. Each one is checked against hard numbers like margins and returns: which hold, and which line gives way first.
Beyond airline rivals and Boeing deliveries, watch Chase: Southwest’s loyalty revenue and earnings depend materially on their co-branded credit-card agreement.
American Airlines Group competes with Southwest for U.S. passengers’ ticket spending through fares, schedules, nonstop flights and loyalty benefits. Watch American’s fare discounts and route changes for competition facing Southwest’s frequent nonstop service.
Delta competes with Southwest for paying domestic passengers through overlapping U.S. networks, fares and loyalty programs. Delta’s expansion of flights at its core hubs is worth watching for competition over those passengers.
United Airlines competes with Southwest for domestic passengers’ ticket spending, particularly around their substantial operations in Chicago, Denver and Houston.
Southwest depends entirely on Boeing for its aircraft, so delays in the planes Boeing sells to airlines directly constrain Southwest’s fleet plans. Watch 737 deliveries and FAA certification of the 737-7, which determines that model’s delivery timing.
Alaska Air Group and its Hawaiian brand compete with Southwest for ticket spending by passengers traveling along the West Coast and to Hawaii.
JetBlue competes with Southwest for domestic and Caribbean leisure travelers, selling point-to-point flights with different fare tiers. Watch JetBlue’s Blue Basic through Blue Extra offerings alongside Southwest’s Basic and Choice fares for how the two airlines compete for travelers’ spending.
Frontier competes with Southwest for low-fare leisure passengers flying within the U.S. and to nearby international destinations. Its base fares and separate charges for baggage and seat selection are the comparison to watch against Southwest’s Basic fare and higher-priced bundles.
Allegiant Travel competes with Southwest for price-sensitive leisure passengers; at December 31, 2025, Southwest overlapped 73 of Allegiant’s routes. Watch Allegiant’s seasonal flight capacity on overlapping routes: it sells low-frequency nonstop flights, mainly to residents of underserved U.S. cities, with baggage and seat assignments priced separately.
United Airlines Holdings, Inc. earningsUAL
United’s report will show whether passenger demand is keeping up with airline capacity in shared markets such as Chicago, Denver and Houston.
Compare United’s domestic passenger revenue per available seat mile—the passenger revenue earned for each mile of seat capacity—with its domestic capacity growth; these company-wide figures cannot isolate Chicago, Denver or Houston. If revenue holds as capacity grows, demand is absorbing more seats, but United remains a strong rival for Southwest; if revenue falls while capacity grows, supply may be outrunning demand and adding pressure on fares in markets they share. The takeaway is whether demand is supporting airline capacity or making fares harder to sustain.
Southwest Airlines Co. earningsThis company
Southwest’s report will show whether fares, checked-bag fees and loyalty revenue are keeping pace with the labor and fuel costs of flying its network.
Compare passenger revenue per available seat mile—the passenger revenue earned for each mile of seat capacity—with operating cost per available seat mile, and check whether passenger traffic keeps pace with capacity. If revenue grows faster than costs while traffic keeps up, fares and fees are helping cover costs without relying on less flying; if revenue slows or costs rise faster, those revenue sources are not yet covering Southwest’s operating burden.
EIA Crude Oil Stocks Change (Oct/16)
Southwest’s weekly EIA crude oil and fuel-stock readings track how much oil and gasoline is in storage; tighter supply can raise the fuel costs it pays, which were 19% of its 2025 operating expenses, and looser supply can lower them.
Read the stock change as a supply signal: falling stocks can point to tighter supply and higher fuel costs for Southwest, while rising stocks can point to looser supply and lower costs.
Boeing Company earningsBA
Boeing’s report will show whether 737 deliveries and 737-7 certification progress are easing the fleet constraints facing Southwest, which depends on Boeing for its aircraft.
Watch Boeing’s 737 delivery pace and progress toward FAA certification of the 737-7. More timely deliveries and certification progress would give Southwest more room to expand or renew its fleet as planned; delays or unresolved certification would leave it more reliant on existing aircraft and constrain fleet growth and network plans. The key question is whether Boeing’s supply and certification progress is easing or extending Southwest’s fleet constraint.
