Delta Air Lines ranks first among these u.s. airlines, and United Airlines ranks second. All five contenders were evaluated on the same published criteria, and their weighted scores determine the order from highest to lowest.
Best overall by weighted score
Delta combines the best-balanced current record in this field: a 79 ACSI score, the strongest 2025 on-time rate among the large nationwide network carriers in DOT data, and another leading showing in J.D. Power's cabin-segment satisfaction study. Its fares are not always the lowest, but fewer weak spots make it the safest all-around choice.Second-highest weighted score
United ranks second because its U.S. hub structure and Star Alliance reach make difficult itineraries easier to build, while its operation and onboard product have improved enough to remain competitive with Delta. It is especially persuasive for international travelers, though the experience can vary by aircraft, route, and cabin.Third-highest weighted score
Alaska pairs a strong recent reliability signal with a well-liked loyalty proposition and a route map that is particularly useful on the West Coast. Its smaller national and international footprint keeps it below United, but travelers based around Seattle, Portland, San Francisco, or Alaska may reasonably rank it first for their own needs.Fourth-highest weighted score
Southwest remains a compelling domestic option where its schedule is strong, with a solid 2025 operational signal and a customer experience built around approachable service and a straightforward network. Its evolving seating and fare model means longtime customers should verify the exact benefits attached to their ticket instead of relying on old…Fifth-highest weighted score
JetBlue earns its place through an unusually appealing onboard proposition and a first-place J.D. Power result in a cabin segment, particularly for travelers who value seat comfort and entertainment. Reliability and a smaller route network are the limiting factors, so a convenient nonstop can be excellent while a connection-heavy itinerary is harder to…Three independent write-ins unlock an honorable mention. The 10 strongest active mentions are shown; inactive mentions archive after 12 months. At 25 monthly votes, a contender enters a scoring review for possible top-five promotion.
No honorable mentions yet. Repeated write-ins merge automatically.
The five criteria create the AI baseline. The community adjustment is then added or subtracted to produce the current published score.
| Criterion | #1Delta Air Lines | #2United Airlines | #3Alaska Airlines | #4Southwest Airlines | #5JetBlue Airways |
|---|---|---|---|---|---|
| 97 | 90 | 94 | 91 | 78 | |
| 95 | 88 | 91 | 86 | 96 | |
| 94 | 99 | 78 | 88 | 75 | |
| 92 | 91 | 95 | 82 | 80 | |
| 78 | 80 | 84 | 91 | 86 | |
| AI baseline scoreWeighted criteria result | 93.3 | 90.5 | 89.2 | 87.8 | 83.0 |
| Community adjustmentVote-share influence | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Current published scoreBaseline + community | 93 | 91 | 89 | 88 | 83 |
Select any two contenders above.
We’ll line up what matters.
79
75
Best large network carrier
Upper tier among large carriers
Large domestic and global network
Exceptional international reach
Reliable all-around trips
Global and connecting itineraries
Often premium-priced
Experience varies by route
SummaRank compared current information from U.S. Department of Transportation, American Customer Satisfaction Index, J.D. Power, Cirium and the linked official or research references. Each contender was scored independently on the same five-part scorecard: Reliability 30%, Experience 25%, Network 20%, Flexibility 15%, Value 10%. The weighted total determines the published order from highest to lowest, and verified community voting can make a limited, visible adjustment.
The five criteria create the AI baseline. The community adjustment is then added or subtracted to produce the current published score.
| Criterion | #1Delta Air Lines | #2United Airlines | #3Alaska Airlines | #4Southwest Airlines | #5JetBlue Airways |
|---|---|---|---|---|---|
| 97 | 90 | 94 | 91 | 78 | |
| 95 | 88 | 91 | 86 | 96 | |
| 94 | 99 | 78 | 88 | 75 | |
| 92 | 91 | 95 | 82 | 80 | |
| 78 | 80 | 84 | 91 | 86 | |
| AI baseline scoreWeighted criteria result | 93.3 | 90.5 | 89.2 | 87.8 | 83.0 |
| Community adjustmentVote-share influence | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Current published scoreBaseline + community | 93 | 91 | 89 | 88 | 83 |