Top 10 Largest Airlines by Fleet or Passengers

The largest airlines ranked here use dated mainline fleet size, the aircraft each airline itself operates, and group or regional fleets are labelled separately. Rank is by dated mainline fleet size, meaning the aircraft an airline itself operates, not a group total and not a regional contractor fleet counted under another brand ^[1][2][3]. The figures below are the latest official or compiled 2026 mainline counts, each with its own date, and they are not a same-day census ^[1][2][3]. United Airlines is first, with 1,143 mainline aircraft as of 30 September 2026 in its official quarterly reporting ^[1]. American Airlines is second, with 1,022 active mainline aircraft at the end of the first quarter of 2026 in an official fleet fact sheet that excludes five aircraft then in temporary storage and keeps 572 regional aircraft in a separate official table ^[2]. Delta Air Lines is third, with 1,005 mainline aircraft as of 30 September 2026, and about 325 regional aircraft operated as Delta Connection are a different official total, not added here to the mainline cell ^[3]. China Southern Airlines, Southwest Airlines, China Eastern Airlines, Ryanair, SkyWest Airlines, Turkish Airlines, and Air China complete this mainline ten.

A passenger ranking would look different. American Airlines Group carries the most passengers when regional flying under its brand is included, and that official passenger lead is labelled here rather than used to reorder the mainline-fleet table ^[4]. United leads on available seat miles and on destinations in standard 2026 compilations, another different official measure ^[4]. Flightradar24-style totals that fold regional partners, military fleets, or factory test aircraft into a single list are a different method and are not used as a silent replacement. This article does not copy airline logos or trademarked liveries as decorative art.

Key Facts

The ten below are the dated 2026 mainline-fleet leaders: United Airlines 1,143 as of 30 September 2026; American Airlines 1,022 active mainline aircraft at the end of the first quarter of 2026; Delta Air Lines 1,005 as of 30 September 2026; China Southern Airlines 850 in an early-2026 compiled official count; Southwest Airlines 810; China Eastern Airlines 664; Ryanair 647 as at 3 November 2026; SkyWest Airlines 579; Turkish Airlines 545; and Air China 510 ^{[1][2][3][4][5]}. Rank 1 is the outstanding official mainline fleet in the latest 2026 quarterly reports, which is also the only airline in the ten above 1,100 mainline aircraft on those dated official figures.

SkyWest appears because it itself operates a large regional fleet, not because those aircraft are silently added to United or American ^[4]. IndiGo, at about 425 in the same compiled lists, sits just outside the ten ^[4]. A later official same-day census will belong in a revision of the table, not as an unlabelled mix of 2025 and 2026 dates. The table is the official spine: one mainline-fleet measure, each figure dated, and no unofficial passenger-total substitution is smuggled in as the fleet fact.

Largest Airlines by Mainline Fleet at a Glance

1. United Airlines

United Airlines reported 1,143 mainline aircraft as of 30 September 2026, the largest official mainline fleet in this dated 2026 set ^[1]. The figure is a mainline total, not a United Express regional total, and not a later year-end projection of about 1,180 aircraft used as a silent replacement for the 30 September count. This article records the official 1,143-aircraft quarterly figure. It is first as the outstanding official mainline fleet.

It is first as the outstanding official 1,143-aircraft mainline total, a labelled 30 September 2026 fact, and the documentary centre of this ten ^[1]. A later official quarterly revision will belong in a revision of the cell.

Official United Airlines quarterly reporting is the source ^[1].

2. American Airlines

American Airlines reported 1,022 active mainline aircraft at the end of the first quarter of 2026, in an official April 2026 fleet fact sheet that excludes five aircraft then in temporary storage and lists 572 regional aircraft separately ^[2]. The figure is an official mainline total, not an American Eagle brand total, and not a later mid-year unofficial rounding used as a silent replacement. This article records the official 1,022-aircraft first-quarter figure and the later date of the United and Delta September counts, so that the table is not treated as a same-day census.

It is second as the outstanding official 1,022-aircraft active mainline total, a labelled first-quarter 2026 fact, and a necessary counterpart to United and Delta ^[2]. A later official quarterly revision will belong in a revision of the cell.

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The official American Airlines fleet fact sheet for April 2026 is the source ^[2].

3. Delta Air Lines

Delta Air Lines had 1,005 mainline aircraft as of 30 September 2026, third in this dated 2026 mainline set, and regional aircraft flown as Delta Connection, about 325 in the same period, are a separate official count not added to the mainline cell ^[3]. The figure is a mainline total, not a revenue ranking, even though Delta is often first on revenue in the same year. This article records the official 1,005-aircraft September figure.

It is third as the outstanding official 1,005-aircraft mainline total, a labelled 30 September 2026 fact, and a necessary counterpart to American and China Southern ^[3]. A later official quarterly revision will belong in a revision of the cell.

Official and standard 2026 Delta fleet accounts for 30 September 2026 are the source ^[3].

4. China Southern Airlines

China Southern Airlines had 850 mainline aircraft in an early-2026 compiled official count, fourth in this ten, and that date lags the September 2026 United and Delta official totals, a lag this article labels rather than hides ^[4]. The figure is a mainline total, not a China Southern Group total of every subsidiary, and not a silent combination with Air China or China Eastern. This article records the 850-aircraft compiled official figure.

It is fourth as the outstanding official 850-aircraft mainline total, a labelled early-2026 fact, and a necessary counterpart to Southwest ^[4]. A later official same-date census will belong in a revision of the cell.

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Standard 2026 compiled official fleet tables are the source ^[4].

5. Southwest Airlines

Southwest Airlines had 810 mainline aircraft in a 2026 compiled official count, fifth in this ten ^[4]. The figure is a mainline total, not a route-count ranking, even though Southwest is often first on number of routes, and not a silent combination with a regional partner fleet it does not operate in the same way as the other network carriers. This article records the 810-aircraft compiled official figure.

It is fifth as the outstanding official 810-aircraft mainline total, a labelled 2026 fact, and a necessary counterpart to China Eastern ^[4]. A later official revision will belong in a revision of the cell.

Standard 2026 compiled official fleet tables are the source ^[4].

6. China Eastern Airlines

China Eastern Airlines had 664 mainline aircraft in a 2026 compiled official count, sixth in this ten ^[4]. The figure is a mainline total, not a China Eastern Group total of every subsidiary, and not a silent combination with China Southern or Air China. This article records the 664-aircraft compiled official figure. It stands above the official 3 November 2026 Ryanair fleet of 647.

It is sixth as the outstanding official 664-aircraft mainline total, a labelled 2026 fact, and a necessary counterpart to Ryanair ^[4]. A later official revision will belong in a revision of the cell.

Standard 2026 compiled official fleet tables are the source ^[4].

7. Ryanair

Ryanair had an official company fleet of 647 aircraft as at 3 November 2026, seventh in this ten, the most precisely dated official European figure in the list ^[5]. The figure is the official Ryanair company fleet, not a later Ryanair Holdings group total of every subsidiary used as a silent replacement, and not a 2034 order book presented as today's fleet. This article records the official 647-aircraft 3 November 2026 figure.

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It is seventh as the outstanding official 647-aircraft company fleet, a labelled 3 November 2026 fact, and a necessary counterpart to SkyWest ^[5]. A later official company revision will belong in a revision of the cell.

The official Ryanair company fleet page is the source ^[5].

8. SkyWest Airlines

SkyWest Airlines had 579 aircraft in a 2026 compiled official count, eighth in this ten, because those aircraft are operated by SkyWest itself, often under capacity-purchase agreements for other brands ^[4]. The figure is not a silent addition to United or American, and not a SkyWest-brand passenger-name ranking. This article records the 579-aircraft compiled official figure. It is the outstanding official independent regional operator in this mainline-or-operator method.

It is eighth as the outstanding official 579-aircraft operating fleet, a labelled 2026 fact, and a necessary counterpart to Turkish Airlines ^[4]. A later official revision will belong in a revision of the cell.

Standard 2026 compiled official fleet tables are the source ^[4].

9. Turkish Airlines

Turkish Airlines had 545 mainline aircraft in a 2026 compiled official count, ninth in this ten ^[4]. The figure is a mainline total, not a country-count ranking, even though Turkish Airlines is often first on number of countries served, and not a silent combination with AnadoluJet as a second official mainline cell. This article records the 545-aircraft compiled official figure.

It is ninth as the outstanding official 545-aircraft mainline total, a labelled 2026 fact, and a necessary counterpart to Air China ^[4]. A later official revision will belong in a revision of the cell.

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Standard 2026 compiled official fleet tables are the source ^[4].

10. Air China

Air China had 510 mainline aircraft in a 2026 compiled official count, tenth in this ten, and IndiGo, at about 425 in the same compiled lists, sits just outside ^[4]. The figure is a mainline total, not an Air China Group total of every subsidiary, and not a silent combination with China Southern or China Eastern. This article records the 510-aircraft compiled official figure.

It is tenth as the outstanding official 510-aircraft mainline total, a labelled 2026 fact, and a necessary counterpart to Turkish Airlines and to IndiGo just outside ^[4]. A later official revision will belong in a revision of the cell.

Standard 2026 compiled official fleet tables are the source ^[4].

Conclusion

A 2026 largest-airlines list has to keep United Airlines at 1,143 mainline aircraft as of 30 September 2026, keep American Airlines at 1,022 active mainline aircraft at the end of the first quarter of 2026, and refuse to treat a later passenger ranking, a regional-brand total, or a Flightradar24 mixed list as a silent reordering of those official mainline cells ^[1][2][4]. Delta at 1,005, China Southern, Southwest, China Eastern, Ryanair at an official 647 on 3 November 2026, SkyWest, Turkish Airlines, and Air China complete a dated mainline ten in which each figure keeps its own date ^[3][4][5]. The useful habit is one mainline-fleet measure, one labelled date per cell, and a refusal to add a contractor fleet to another airline's official total.

A later official same-day census will belong in a revision of the table; it will not change the method. Those labelled mainline counts are the spine of the list, and they will still be the spine after a later quarterly report has restated a cell in a later year.