Delta vs United vs Southwest: 6 Airline Apps Ranked (2026)

Airline apps are among the most-hated apps in the App Store. Not because the apps themselves are uniquely bad, most are fine in normal conditions, but because users only open them in two states: casual planning (minutes) and high-stress travel disruption (hours). In that second state, a buggy app becomes the face of a $400 inconvenience, and the reviews reflect it.

We analyzed 1-3 star reviews across the 6 largest US airline apps to see exactly when each app breaks down, and which airlines are managing to ship apps that survive the travel-day test in 2026.

Apps Analyzed

We looked at 1-3 star reviews from:

• Delta (Fly Delta), historically the best-reviewed US airline app
• United (United Airlines), recent overhaul, mixed reception
• American (American Airlines), largest fleet, middle-of-pack reviews
• Southwest: the unique no-seat-assignment model
• JetBlue: smaller fleet, boutique positioning
• Alaska Airlines: West Coast focus, often top-rated for service

Top Complaints Across Airline Apps

Percentages reflect complaint frequency in our 1-3 star sample.

1. Check-In & Boarding Pass Failures (31%)

The single largest complaint category, travel-day check-in problems. Airlines force users into the app for mobile boarding passes, and when the app fails, users can't board.

• "App crashed at boarding, had to go to the gate agent": the canonical complaint
• "Boarding pass wouldn't load on plane WiFi": offline/caching failures
• "Had to log back in right before boarding": session-timeout disasters
• "QR code wouldn't scan at the gate": display-brightness or format issues

Every airline app gets this wrong periodically, but the frequency and severity varies dramatically. Delta's mobile check-in works an order of magnitude more reliably than American's, and the reviews reflect it.

2. Rebooking Friction (19%)

When a flight is delayed or canceled, the airline app is theoretically the self-service path to rebooking. In practice, it works poorly enough that users review the app during the rebooking process itself.

• "App offered me flights 3 days later when there were same-day alternatives"
• "Couldn't rebook through the app, had to call, 2.5-hour wait"
• "Said 'please contact customer service', no rebooking options shown"
• "Rebooked me but didn't refund the fare difference"

American and United are the worst offenders in our sample. Southwest's rebooking UX is more limited (no seat assignments) but also less brittle.

3. Baggage Tracking Issues (13%)

Every major airline app has a baggage tracker. Every major airline app's baggage tracker is unreliable. Reviews document the exact failure modes:

• "Tracker said my bag was on the plane, it wasn't"
• "Bag arrived before I did, tracker said still in Atlanta"
• "Never got a 'bag claimed' update, no idea where it is"
• "Tracker only works for flights I'm physically on"

Baggage complaints spike during disruption, weather delays, strikes, and labor actions all produce review surges specifically about the baggage tracker being wrong.

4. App Crashes & Performance (11%)

Airline apps are large (200-400MB), carry heavy assets, and run on every iOS and Android version going back years. Crashes cluster in predictable moments:

• "Crashes every time I try to pull up my boarding pass"
• "Freezes on Apple Pay checkout": payment-flow crashes
• "Had to force-quit 3 times to check in"
• "Uses too much battery during travel day": sustained-use complaints

5. Loyalty Program & Miles Issues (9%)

• "Miles not showing after the flight"
• "Status credits from my connection didn't post"
• "Elite perks not honored, showed as regular fare in app"
• "Points expired and app didn't warn me"

Status-tier users leave disproportionately harsh reviews, they're the most valuable customers and feel specifically neglected when the app mishandles their benefits.

6. Seat Selection & Upgrade Pricing (8%)

• "Basic Economy charged me $40 per seat, one-way"
• "Upgrade offer changed price at checkout"
• "Couldn't select my assigned seat, grayed out"
• "Paid to pick a seat, got moved to a middle anyway"

The seat-map UX is relatively standardized across airlines, but the pricing logic is opaque and drives complaints specifically about surprise charges.

7. WiFi, Streaming & Onboard Features (5%)

• "T-Mobile free WiFi voucher didn't work"
• "Can't cast to my screen, streaming broken"
• "Offline entertainment requires downloading in-app first, didn't know"
• "No food pre-order option even though my flight supports it"

8. Payment & Booking Flow (4%)

• "Apple Pay broken for a week, couldn't book"
• "Fare jumped $100 between search and checkout"
• "Couldn't apply travel credit at checkout, had to call"

The 6 Apps Ranked

1. Delta (Fly Delta)

Star rating: 4.9 ★ iOS / 4.8 ★ Android

Strongest complaints: New UI redesign, TSA PreCheck mismatch, in-flight streaming WiFi gate

Delta's app is the best-reviewed airline app in the US, with good reason, the mobile check-in reliability is the best in our sample, the boarding pass renders quickly and survives offline, and the rebooking flow actually works during disruption.

The complaints are the kind an airline earns only when the baseline is high: the 2024 UI redesign moved some buttons and generated a predictable wave of "old version was better" reviews, and TSA PreCheck status sometimes doesn't reflect on boarding passes.

The in-flight streaming/WiFi flow is the most-cited specific frustration: users have to download Delta Sync pre-flight to access free T-Mobile WiFi, and the app surfaces this requirement confusingly. Multiple 1-2 star reviews are specifically about figuring out WiFi on a specific flight.

Review tone: Loyal-but-nitpicky. 5-star reviews dominate; the 1-3 star reviews read like users who generally love the app complaining about narrow issues.

2. Alaska Airlines

Star rating: 4.8 ★ iOS / 4.7 ★ Android

Strongest complaints: Limited international route coverage, Horizon Air codeshare confusion, slow Android app

Alaska has the second-highest review scores in our sample. The app is well-built, reliably handles check-in and boarding, and integrates cleanly with the Oneworld alliance post-merger.

The complaints are surprisingly specific:

• Horizon Air codeshare: Alaska's regional partner shows up inconsistently in the app
• International bookings: Alaska's international partnerships require calling for some fare classes, which the app doesn't explain well
• Android performance: the Android app is noticeably slower to load than iOS, accounting for the modest rating gap

Mileage Plan complaints are the second-loudest theme, Alaska has a mile-based award-pricing model that the app makes hard to understand, and users booking award flights leave 1-2 star reviews complaining about the UX.

Review tone: Appreciative. Users tend to compare Alaska favorably to other airlines, and the reviews reflect that even when they're critical.

3. JetBlue

Star rating: 4.8 ★ iOS / 4.6 ★ Android

Strongest complaints: TrueBlue points confusion, rebooking during disruption, check-in bugs

JetBlue's app has strong reviews and specific failure modes. The app is visually polished and handles normal operations well, but rebooking during the 2024 wave of operational disruptions (labor action, weather) generated a cluster of 1-star reviews specifically about the app freezing during rebooking.

TrueBlue loyalty program changes throughout 2024-2025 drew complaints about devaluation and unclear redemption UI. Flyers who pay attention to the program are specifically angry in reviews; casual flyers rate the app higher.

Check-in reliability is better than American and United but worse than Delta and Alaska, our sample shows a recurring bug where check-in succeeds in the app but doesn't propagate to the TSA system, requiring re-check-in at the airport.

Review tone: Brand-aligned. JetBlue users describe themselves as "JetBlue people" and review the app accordingly. The negative reviews are from flyers who feel the brand promise isn't being kept.

4. Southwest

Star rating: 4.8 ★ iOS / 4.7 ★ Android

Strongest complaints: 2022 meltdown legacy, no assigned seating UX, rebooking flexibility

Southwest's star ratings are high, but the 1-3 star reviews carry a unique legacy: the December 2022 operational meltdown (where Southwest canceled ~16,700 flights due to crew-scheduling software failure) still shows up in reviews. Users who were stranded reference the app's role specifically, it failed to show cancellation status, rebooking options were blank, and the experience shaped long-term review sentiment.

Beyond the 2022 hangover, the negative reviews concentrate on Southwest's unique no-assigned-seating model (A-list priority boarding, boarding-position check-in at T-24 hours, etc.). Users from assigned-seat airlines find the model confusing, and the app doesn't explain it well for first-time flyers.

Southwest announced a shift to assigned seating starting in 2025-2026, and reviews from the transition period document users navigating both models, some flights are A-list, some are assigned, and the app UI is inconsistent.

Review tone: Distinctive. Southwest reviews read differently from other airlines, more loyal, more confused by the model, and still scarred by 2022.

5. United Airlines

Star rating: 4.8 ★ iOS / 4.6 ★ Android

Strongest complaints: Rebooking hostile during disruption, MileagePlus redemption UX, Basic Economy fees

United's app has modernized significantly over the past 5 years, but review scores haven't fully recovered from the brand-damage cycles of the 2010s. The app itself is functional; the reviews reflect frustration with United's operational and pricing practices that the app surfaces.

Rebooking during disruption is the strongest specific complaint. United's app frequently offers rebooking options that are worse than what a phone agent can access, users who call get better flights than the app shows, which reads as deception in reviews.

MileagePlus redemption UX is the second-loudest theme: dynamic pricing on award flights means the app often shows high redemption values that users perceive as bait-and-switch from publicized "starting at" pricing.

Basic Economy fee disclosure is the third-loudest theme. Users booking the cheapest fare find the app adds carry-on restrictions, seat-selection fees, and boarding-group fees at checkout that aren't clearly disclosed during search.

Review tone: Resigned. Users who fly United often describe themselves as "stuck with United" and review the app with that undertone.

6. American Airlines

Star rating: 4.7 ★ iOS / 4.4 ★ Android

Strongest complaints: Crashes during travel day, rebooking functionally broken, AAdvantage integration

American has the lowest reviews in our sample, and the complaint patterns are the most operationally severe. The check-in and boarding-pass reliability is the worst of the six, every other airline app has sporadic check-in failures, but American's reviews read as though failures are the norm.

Rebooking in the app is essentially nonfunctional during disruption. Multiple 1-star reviews document the same flow: flight canceled → app shows "contact customer service" instead of rebooking options → phone hold of 2-4 hours. Customers who had loyalty status specifically call out the worse treatment on American compared to Delta or United.

AAdvantage integration has been a multi-year complaint theme. Miles post slowly (sometimes 7-14 days), status credits are inconsistent, and the app's loyalty UX is less clear than competitors'.

Android performance is notably worse than iOS on American, the Android app is 340MB+, loads slowly, and accounts for most of the 0.3-star rating gap in our sample.

Review tone: Frustrated-loyal. American has the largest US fleet and captures flyers who can't easily choose otherwise; the reviews reflect that captive frustration.

Travel-Day vs. Planning-Day Reviews

Airline-app reviews cluster into two very different modes:

Planning-day reviews (booking, checking status, researching):

• Generally milder
• Focus on search UX, fare clarity, rewards
• 3-4 star dominant

Travel-day reviews (check-in, boarding, rebooking, baggage):

• Much harsher
• Focus on app reliability, crashes, specific failures
• 1-2 star dominant

The difference in severity suggests airline apps optimize for the planning use case (where reviews influence discovery) at the expense of the travel use case (where reviews influence loyalty). This is backwards, travel-day reliability determines retention, and retention determines revenue.

Platform Differences (iOS vs Android)

iOS leads every airline app in our sample except Alaska (where iOS and Android are nearly equal). Apple Wallet integration, Face ID auth for boarding passes, and newer iPhones' brightness-control for QR codes all contribute.

Android reviews are harsher about:

• Samsung Pay / Google Pay: payment flow inconsistencies that don't affect iOS Apple Pay
• Widget support: airline apps' widgets are more basic on Android and break with Android launcher variations
• Permissions: location permissions for bag tracking and gate changes produce more Android friction

What This Means for Airline App Builders

The 1-3 star review data points to specific priorities:

• Travel-day reliability beats everything. Planning features don't rescue an app whose boarding pass fails. Engineering headcount should be weighted heavily toward check-in, boarding pass rendering, and offline-mode reliability.

• Rebooking is the brand test. When disruption happens, the app either handles it or it doesn't, and users review you based on the moment when you matter most. Rebooking parity with phone agents is a differentiator, not a nicety.

• Baggage-tracking reliability is a latent crisis. Every airline ships a tracker; every tracker is unreliable enough to generate 1-star reviews. The first airline that gets this right will own the category perception.

• Loyalty UX is a retention driver. Elite-status flyers who feel their perks are being handled correctly stay loyal; flyers who have to call about missing miles don't.

• Disclosure UX determines fare-class reviews. Basic Economy reviews concentrate on "hidden fees", which aren't hidden, just unclear. Search-to-checkout price consistency is a trust feature.

Bottom Line

Delta is the best-reviewed US airline app by meaningful margins, and the reviews align with the operational reputation: reliable, functional, polished. Alaska earns the second spot on similar strengths at a smaller scale. JetBlue and Southwest tie in review quality but earn complaints for different reasons, JetBlue for disruption handling, Southwest for model confusion and legacy issues. United and American bring up the rear, with American specifically struggling with the reliability fundamentals.

If you fly one airline enough to care, search the specific app on Unstar.app and filter by negative reviews, the raw 1-3 star data tells you whether the problems other flyers complain about are the ones you'd actually hit (international routes, elite status, specific aircraft, specific routes), or whether they're edge cases you'd rarely encounter.

Airline apps are a category where the product isn't really the app, it's the airline, and the app is how the airline shows up on travel day. Reviews reflect that reality with unusual clarity. The airlines that treat app reliability as equivalent to flight reliability earn the trust of frequent flyers; the ones that don't, lose them.

Related reading: Travel Booking App Reviews: Biggest Complaints covers the adjacent category of OTAs (Expedia, Booking, Hotels.com) where similar disruption-handling patterns appear. Ride Sharing App Reviews: Uber vs Lyft vs Bolt vs Grab covers another travel-adjacent category where app reliability becomes part of the service experience.