Busiest airlines, May 2025

198,166 flights, American Airlines (AA)

The busiest airline in May 2025 was American Airlines (AA), with 198,166 flights.

May 2025 (1–31 May 2025) Source: www.airportia.com/statistics/busiest-airlines/2025-05/

Period: 1–31 May 2025 (UTC). Data calculated on 3 November 2026 at 04:00 UTC. In the average departure delay, early and cancelled flights count as 0. How we calculate this

Top 15 airlines by flights
Busiest airlines, May 2025: top 15, flights1–31 May 2025. Source: Airportia.1. American Airlines (AA): 198,166 (191,777 flights)1. American Airlines (AA)198,1662. Delta Air Lines (DL): 157,903 (152,795 flights)2. Delta Air Lines (DL)157,9033. United Airlines (UA): 147,736 (143,138 flights)3. United Airlines (UA)147,7364. Southwest Airlines (WN): 122,583 (118,783 flights)4. Southwest Airlines (WN)122,5835. Ryanair (FR): 105,194 (101,829 flights)5. Ryanair (FR)105,1946. China Eastern Airlines (MU): 72,870 (70,549 flights)6. China Eastern Airlines (MU)72,8707. IndiGo Airlines (6E): 68,892 (66,666 flights)7. IndiGo Airlines (6E)68,8928. China Southern Airlines (CZ): 64,993 (62,930 flights)8. China Southern Airlines (CZ)64,9939. easyJet (U2): 54,405 (52,704 flights)9. easyJet (U2)54,40510. Air China (CA): 50,885 (49,274 flights)10. Air China (CA)50,88511. LATAM Airlines (LA): 47,382 (45,836 flights)11. LATAM Airlines (LA)47,38212. Alaska Airlines (AS): 39,647 (38,331 flights)12. Alaska Airlines (AS)39,64713. Lufthansa (LH): 37,016 (35,823 flights)13. Lufthansa (LH)37,01614. All Nippon Airways (NH): 36,618 (35,444 flights)14. All Nippon Airways (NH)36,61815. Turkish Airlines (TK): 36,295 (35,132 flights)15. Turkish Airlines (TK)36,295

Every airline with at least one flight in the period and reported departure times is included.

Full ranking: 731 airlines

The first 100 are shown here; the CSV has all 731.

# Airline Country Flights Avg departure delay Cancelled Flights
1 American Airlines (AA) United States United States 198,166 37.7 min 2.2% 191,777
2 Delta Air Lines (DL) United States United States 157,903 31.9 min 0.7% 152,795
3 United Airlines (UA) United States United States 147,736 36.1 min 1.7% 143,138
4 Southwest Airlines (WN) United States United States 122,583 28.6 min 0.5% 118,783
5 Ryanair (FR) Ireland Ireland 105,194 22.5 min 0.3% 101,829
6 China Eastern Airlines (MU) China China 72,870 23.8 min 2.3% 70,549
7 IndiGo Airlines (6E) India India 68,892 18.1 min 0.0% 66,666
8 China Southern Airlines (CZ) China China 64,993 32.8 min 0.1% 62,930
9 easyJet (U2) United Kingdom United Kingdom 54,405 24.4 min 0.3% 52,704
10 Air China (CA) China China 50,885 24.6 min 1.3% 49,274
11 LATAM Airlines (LA) Chile Chile 47,382 18.5 min 0.9% 45,836
12 Alaska Airlines (AS) United States United States 39,647 26.6 min 0.5% 38,331
13 Lufthansa (LH) Germany Germany 37,016 12.9 min 0.8% 35,823
14 All Nippon Airways (NH) Japan Japan 36,618 13.0 min 0.7% 35,444
15 Turkish Airlines (TK) Turkey Turkey 36,295 13.5 min 0.0% 35,132
16 Air Canada (AC) Canada Canada 32,977 27.8 min 1.6% 31,914
17 British Airways (BA) United Kingdom United Kingdom 27,793 27.6 min 0.5% 26,875
18 Japan Airlines (JL) Japan Japan 26,438 19.0 min 0.8% 25,583
19 Azul Brazilian Airlines (AD) Brazil Brazil 26,424 16.5 min 1.1% 25,523
20 JetBlue Airways (B6) United States United States 26,028 33.3 min 0.4% 25,240
21 Air France (AF) France France 25,617 28.9 min 1.1% 24,771
22 Aeroflot (SU) Russia Russia 25,167 16.3 min 0.2% 24,402
23 KLM (KL) Netherlands Netherlands 23,391 26.0 min 1.7% 22,635
24 Qantas (QF) Australia Australia 23,322 17.1 min 2.2% 22,529
25 Hainan Airlines (HU) China China 22,337 27.4 min 1.2% 21,631
26 Air India (AI) India India 22,206 29.0 min 2.3% 21,482
27 SAS (SK) Norway Norway 22,173 12.9 min 0.3% 21,375
28 Shenzhen Airlines (ZH) China China 21,994 40.5 min 0.2% 21,280
29 Avianca (AV) Colombia Colombia 21,737 16.8 min 1.2% 21,036
30 Vueling (VY) Spain Spain 20,627 21.3 min 1.0% 19,969
31 Xiamen Airlines (MF) China China 20,325 26.8 min 0.0% 19,674
32 Spirit Airlines (NK) United States United States 19,662 33.1 min 1.2% 19,224
33 Sichuan Airlines (3U) China China 19,594 23.2 min 0.5% 18,977
34 Pegasus Airlines (PC) Turkey Turkey 19,286 24.8 min 0.3% 18,681
35 Iberia (IB) Spain Spain 19,192 20.7 min 0.0% 18,564
36 GOL Transportes Aeros (G3) Brazil Brazil 19,106 11.9 min 0.6% 18,463
37 Eurowings (EW) Germany Germany 17,959 21.4 min 0.0% 17,365
38 WestJet (WS) Canada Canada 17,714 25.5 min 1.1% 17,127
39 Frontier Airlines (F9) United States United States 17,239 43.3 min 0.8% 16,948
40 Shandong Airlines (SC) China China 17,146 19.5 min 0.4% 16,592
41 Saudi Arabian Airlines (SV) Saudi Arabia Saudi Arabia 17,008 17.5 min 1.1% 16,461
42 AirAsia (AK) Malaysia Malaysia 16,820 21.3 min 0.0% 16,325
43 Qatar Airways (QR) Qatar Qatar 16,697 19.9 min 0.3% 16,167
44 Aeroméxico (AM) Mexico Mexico 16,148 26.0 min 0.0% 15,603
45 Spring Airlines (9C) China China 15,996 23.7 min 1.3% 15,494
46 Emirates (EK) United Arab Emirates United Arab Emirates 15,533 26.9 min 0.3% 15,042
47 Air India Express (IX) India India 15,333 22.5 min 0.1% 14,846
48 Volaris (Y4) Mexico Mexico 15,007 20.9 min 0.4% 14,565
49 VietJet Air (VJ) Vietnam Vietnam 14,767 33.0 min 0.0% 14,273
50 VivaAerobus (VB) Mexico Mexico 14,698 17.3 min 0.0% 14,250
51 Air New Zealand (NZ) New Zealand New Zealand 13,848 16.7 min 2.9% 13,391
52 Lion Airlines (JT) Indonesia Indonesia 13,631 32.3 min 0.2% 13,201
53 Jet2.com (LS) United Kingdom United Kingdom 13,556 32.9 min 0.0% 13,206
54 Ethiopian Airlines (ET) Ethiopia Ethiopia 13,546 9.6 min 0.0% 13,112
55 Swiss (LX) Switzerland Switzerland 13,464 28.1 min 0.7% 13,035
56 Virgin Australia (VA) Australia Australia 13,231 17.3 min 0.7% 12,767
57 China Express Airlines (G5) China China 13,195 17.0 min 2.3% 12,780
58 Vietnam Airlines (VN) Vietnam Vietnam 12,745 27.7 min 0.0% 12,348
59 Wizz Air Malta (W4) Malta Malta 12,252 19.5 min 0.0% 11,856
60 Wizz Air (W6) Hungary Hungary 12,002 19.7 min 0.0% 11,618
61 Korean Air (KE) South Korea South Korea 11,555 26.4 min 0.5% 11,176
62 Allegiant Air (G4) United States United States 11,494 30.1 min 0.1% 11,287
63 Austrian Airlines (OS) Austria Austria 11,477 7.5 min 0.4% 11,097
64 CEBU Pacific Air (5J) Philippines Philippines 11,279 28.2 min 0.0% 10,915
65 ITA Airways (AZ) Italy Italy 11,170 23.0 min 0.0% 10,811
66 Tianjin Airlines (GS) China China 11,150 22.0 min 0.3% 10,791
67 Copa Airlines (CM) Panama Panama 11,094 16.5 min 0.1% 10,729
68 Juneyao Airlines (HO) China China 10,859 25.0 min 0.6% 10,517
69 Malaysia Airlines (MH) Malaysia Malaysia 10,842 19.9 min 0.9% 10,516
70 Thai AirAsia (FD) Thailand Thailand 10,792 13.4 min 0.0% 10,462
71 Aer Lingus (EI) Ireland Ireland 10,764 20.5 min 0.3% 10,428
72 Jetstar Airways (JQ) Australia Australia 10,550 20.3 min 0.6% 10,209
73 TAP Portugal (TP) Portugal Portugal 10,502 32.6 min 0.0% 10,203
74 Widerøe (WF) Norway Norway 10,419 4.3 min 0.0% 10,011
75 Finnair (AY) Finland Finland 10,364 16.6 min 3.3% 10,026
76 Philippine Airlines (PR) Philippines Philippines 10,315 24.1 min 1.1% 9,990
77 Singapore Airlines (SQ) Singapore Singapore 10,257 23.7 min 0.0% 9,928
78 flydubai (FZ) United Arab Emirates United Arab Emirates 10,253 19.1 min 1.0% 9,941
79 Aegean Airlines (A3) Greece Greece 10,007 27.3 min 1.3% 9,697
80 Transavia France (TO) France France 9,874 20.0 min 0.1% 9,606
81 Shanghai Airlines (FM) China China 9,776 23.0 min 0.5% 9,472
82 Chengdu Airlines (EU) China China 9,753 16.2 min 0.7% 9,447
83 LOT (LO) Poland Poland 9,669 17.3 min 0.0% 9,340
84 SunExpress (XQ) Turkey Turkey 9,621 24.0 min 0.1% 9,327
85 Flex Flight (W2) Denmark Denmark 9,499 0.0 min 0.0% 9,215
86 Cathay Pacific (CX) Hong Kong Hong Kong 9,347 27.5 min 0.1% 9,066
87 Grant Aviation (GV) United States United States 9,307 1.3 min 0.0% 8,977
88 EgyptAir (MS) Egypt Egypt 8,966 10.5 min 0.0% 8,760
89 flynas (XY) Saudi Arabia Saudi Arabia 8,798 12.2 min 0.2% 8,521
90 Binter Canarias (NT) Spain Spain 8,381 6.0 min 0.0% 8,126
91 Pt. Super Air Jet (IU) Indonesia Indonesia 8,143 13.3 min 0.0% 7,887
92 Etihad Airways (EY) United Arab Emirates United Arab Emirates 8,120 23.1 min 0.8% 7,856
93 Aerolineas Argentinas (AR) Argentina Argentina 8,024 18.7 min 0.6% 7,794
94 Batik Air (ID) Indonesia Indonesia 8,008 25.3 min 13.8% 7,747
95 S7 Airlines (S7) Russia Russia 7,989 13.9 min 0.9% 7,732
96 Capital Airlines (JD) China China 7,912 24.7 min 0.1% 7,671
97 Loong Airlines (GJ) China China 7,902 23.2 min 0.0% 7,652
98 Hawaiian Airlines (HA) United States United States 7,836 19.3 min 0.3% 7,593
99 Cape Air (9K) United States United States 7,683 14.0 min 4.1% 7,437
100 Air Algérie (AH) Algeria Algeria 7,545 13.5 min 0.9% 7,315

Cite this

The busiest airline in May 2025 was American Airlines (AA), with 198,166 flights. Source: Airportia, "Busiest airlines, May 2025" (1–31 May 2025), https://www.airportia.com/statistics/busiest-airlines/2025-05/, retrieved 3 November 2026.

Download the data (CSV)

Free to use, including commercially, under CC BY 4.0 : credit Airportia and link to this page. How to use our data. Press and data questions: contact@airportia.com.

How we calculate this

Which flights count
Every flight in Airportia's schedule data (from the Aviation Edge feed) that was scheduled to depart in the period, counted once: code-share listings of the same flight are left out. Days are UTC calendar days.
Departure delay
The actual departure time (or the latest reported estimate when no actual time came in) minus the scheduled departure time. A flight that left early or on time counts as 0 minutes. A flight with no reported departure time, cancelled flights included, also counts as 0, so where the feed is patchy the average is lower than the real one.
Average departure delay
The mean of those delays over all counted flights in the period. It is not the share of flights more than 15 minutes late (the usual on-time measure), and it is about departures, not arrivals.
Why there is no "most punctual" ranking
Because flights without a reported departure time count as 0 minutes, a low average can mean missing data rather than punctuality, and the stored figures do not say how many flights had a reported time. So we only rank the most delayed, and the delay rankings leave out every airport, airline or country whose average delay is exactly 0, which almost always means that no times were reported.
Cancellations
Flights with the status Cancelled, as a share of the counted flights in the period.
Airlines
Flights operated by the airline, wherever they depart from. Cargo airlines are not included. They have their own ranking, Busiest cargo airlines.
Period
A month combines three 10-day periods: days 1–10, 11–20 and the last ten days of the month, weighted by departures. In a 31-day month day 21 is not included; in February the second and third periods overlap by a day or two.
Minimum sample
Every airline with at least one flight in the period and reported departure times is included.

Coverage follows the schedule feed: some regional airports and airlines are missing or report few actual times. These are Airportia's own figures, not official statistics from airports, airlines or regulators.