In Pictures: The Top 10 Busiest U.S. Airlines by Seats for February 2025

We recently touched upon the busiest US airports for the month of February 2025 and found out that the busiest airport offered more than 4.5 million seats. The second busiest airport was Dallas Fort Worth International Airport (DFW), where airlines such as Air Canada Express and Cathay Pacific have hubs. But which are the US airlines that offer the highest number of seats for February 2025? Let’s find out:
[ Note: The rankings were based on the data from OAG, a global air traffic data provider. The data was available when the writer last checked the website on 15th February.]

10. Hawaiian Airlines

Let’s see some of the shortest routes of Hawaii Airlines:

let’s see some of the longest   routes of  Hawaiian Airlines :

Let’s see what kind of aircraft are used by this airline for the operation:

9. Allegiant Air

Allegiant Air Aircraft Airbus A320 at Las Vegas International Airport
Photo: Tomás Del Coro |Wikimedia Commons

let’s see the shortest routes of Allegiant Air:

 

Routes	Distance
Las Vegas (LAS) to Provo (PVU)	341 miles
Las Vegas (LAS) to Santa Maria (SMX)	310 miles
Key West (EYW) to Sanford (SFB)	292-miles
Fresno (FAT) to Las Vegas (LAS)	258 miles

 

let’s explore aircraft that are used by Allegiant Air for its service operation :

Aircraft type	Total Number of aircraft	Average age
Airbus A319	34	19.5 Years
Airbus A320	85	14.6 years
Boeing 737	7	0.6 years

Routes	Distance
Cincinnati (CVG) – Los Angeles (LAX)	1,900 miles
Las Vegas (LAS) – Knoxville (TYS)	1,739 miles
Cincinnati (CVG) – Las Vegas (LAS)	1,678 miles
Grand Rapids, Michigan (GRR) – Las Vegas (LAS)	1,628 miles
Los Angeles (LAX) – Memphis (MEM)	1,619 miles

8. Frontier Airlines

Let’s look at the shortest routes of Frontier Airlines :

let’s see what type of Aircraft are used by Frontier Airlines :

Let’s see some of the long routes of Frontier Airlines :

7. Spirit Airlines

Let’s see the short routes of Spirit Airlines :

let’s see the aircraft which are used by Spirit Airlines :

Let’s see the long routes of Spirit Airlines :

6.JetBlue Airways

Let’s explore which are the short routes of JetBlue Airways where it operates:

Let’s see Aircraft that are used by Jet Blue Airlines :

In the following table  Longest route of  Jet Blue Airways is illustrated :

5. Alaska Airlines

Alaska Airlines is a major carrier on the West Coast, known for its strong presence and steady operations. lets look towards it :

lets see short routes travelled by Alaska Airlines:

Alaska Airlines operates primarily in the West Coast market but has expanded to other parts of the US. lets take closer look towards what type of aircraft it uses :

Aircraft type	Total Number of aircraft	Average age
Boeing 737	238	10.2 Years
Embraer ERJ-170	86	6.0 years

Lets see which are the Longest routes of Alaska Airlines:

Routes	Distance
Anchorage (ANC) – Kona (KOA)	2,874 miles
Chicago O’Hare (ORD) – Anchorage (ANC)	2,846 miles
Anchorage (ANC) – Kahului, Hawaii (OGG)	2,797 miles
Honolulu (HNL) – Anchorage (ANC)	2,777 miles

 

4. United Airlines

This table provides insight into United Airlines short routes :

Routes	Distance
San Francisco (SFO) – Santa Rosa/Sonoma County, California (STS)	66 miles
Colorado Springs (COS) – Denver (DEN)	67 miles
College Station, Texas (CLL) – Houston Bush Intercontinental (IAH)	74 miles
Washington Dulles (IAD) – Shenandoah Valley, Virginia (SHD)	91 miles

United Airlines operates an extensive route network both domestically and internationally. This table discusses about types of aircrafts used by  United Airlines :

Aircraft type	Total Number of aircraft	Average age
Airbus A319	81	23.3 Years
Airbus A320	78	25.5 Years
Airbus A321	31	0.6 years
Boeing 737	529	12.3 years
Boeing 757	61	26.2 years
Boeing 767	53	27.3 years
Boeing 777	96	21.5 years
Boeing 787 Dreamliner	76	6.9 years

 Lets see long routes of Alaska Airlines : 

Routes	Distance
Houston Bush Intercontinental (IAH) – Sydney, Australia (SYD)	8,591 miles
San Francisco (SFO) – Singapore (SIN)	8,433 miles
Newark (EWR) – Hong Kong (HKG)	8,045 miles
Los Angeles (LAX) – Melbourne, Australia (MEL)	7,922 miles

3. Delta Air Lines

Delta Air Lines is one of the largest airlines globally, with a significant presence in both domestic and international markets. Below is a brief overview of it:

Delta operates a diverse network of routes, focusing on major hubs and international destinations. Following table shows what kind of Aircrafts are operated by Delta Airlines  to reach destinations :

Aircraft type	Total Number of aircraft	Average age
Airbus A220	75	4.0 Years
Airbus A319	57	23.0 Years
Airbus A320	55	29.0 Years
Airbus A321	196	4.6 Years
Airbus A330	74	10.9 Years
Airbus A350 XWB	35	5.2 Years
Boeing 717	80	23.4 Years
Boeing 737	240	13.8 Years
Boeing 757	114	27.1 Years
Boeing 767	61	27.1 Years

Routes	Distance
Atlanta (ATL) – Johannesburg (JNB)	8,433 miles
Mumbai (BOM) – New York (JFK)	7,797 miles
Atlanta (ATL) – Shanghai (PVG)	7,659 miles
Los Angeles (LAX) – Sydney, Australia (SYD)	7,487 miles

2. Southwest Airlines

Southwest Airlines is one of the largest and most popular low-cost carriers in the United States. Known for its unique business model and customer-friendly policies, lets know more about it from the table :

Routes	Distance
Kahului, Hawaii (OGG) – Honolulu (HNL)	101 miles
Lihue, Hawaii (LIH) – Honolulu (HNL)	102 miles
Grand Rapids, Michigan (GRR) – Chicago (MDW)	137 miles
Reno (RNO) – Oakland (OAK)	181 miles

some of the aircraft type which is used by southwest Airlines are enlisted below : 

Aircraft type	Total	Average year
Boeing 737	800	11.7 years

1. American Airlines

American Airlines is the largest airline in the U.S. by seat capacity, maintaining a strong position in both domestic and international markets. lets see more details about it:

This table provides insight about long routes of American Airlines :