The United States (US) has the largest domestic aviation market globally, with 91 million seats in October 2024. Here’s an overview of the busiest domestic flight routes in the USA for October 2024, based on the number of seats in airlines’ schedules, as reported by OAG.
These high-traffic routes showcase the significant demand for domestic air travel within the United States. The data reveals the most popular city pairs for flights, reflecting the movement of passengers across the country.
Busiest Domestic Routes in the US
| Rank | Airport Pair | Route | Seats |
|---|---|---|---|
| 1 | LAX-SFO | Los Angeles – San Francisco | 319,064 |
| 2 | LAS-LAX | Las Vegas – Los Angeles | 303,394 |
| 3 | ATL-MCO | Atlanta – Orlando | 288,226 |
| 4 | LGA-ORD | New York La Guardia – Chicago | 283,592 |
| 5 | JFK-LAX | New York JFK -Los Angeles | 282,426 |
| 6 | HNL-OGG | Honolulu – Kahului | 281,910 |
| 7 | DEN-PHX | Denver – Phoenix | 277,221 |
| 8 | ATL-LGA | Atlanta – New York La Guardia | 261,878 |
| 9 | DEN-LAS | Denver – Las Vegas | 247,461 |
| 10 | DEN-ORD | Denver – Chicago O’Hare | 239,841 |
1. Los Angeles – San Francisco (LAX-SFO)
The busiest domestic flight route in the United States for October 2024 is the 1.5-hour trip from Los Angeles International Airport (LAX) to San Francisco (SFO).
This route has 319,064 scheduled seats, accounting for approximately 0.4% of the total U.S. domestic airline capacity. The most frequent flyer airline on this route is United Airlines (UA).
Airlines that fly on these routes are:
- United Airlines (UA)
- Southwest Airlines (WN)
- American Airlines (AA)
- Delta Air Lines (DL)
- Alaska Airlines (AS)
- Frontier (F9)
2. Las Vegas – Los Angeles (LAS-LAX)
The second busiest domestic route is from Las Vegas (LAS) to Los Angeles (LAX), with 303,984 scheduled seats.
Southwest Airlines (WN) has more flights than other airlines operating on this route.
Airlines that fly on Las Vegas – Los Angeles routes are:
- United Airlines (UA)
- Spirit Airlines (NK)
- Southwest Airlines (WN)
- American Airlines (AA)
- Delta Air Lines (DL)
- Alaska Airlines (AS)
- Frontier (FL)
- JSX (XE)
3. Atlanta – Orlando (ATL-MCO)
Atlanta’s Hartsfield-Jackson Atlanta International Airport (ATL), the busiest airport in the U.S., appears twice on the list of the top domestic flight routes. The third busiest route is from Atlanta (ATL) to Orlando (MCO) with scheduled seats of 288,226.
Most flights operate on the Atlanta (ATL) – Orlando (MCO) route by Delta Air Lines (DL).
Airlines that fly on these routes are:
- Delta Air Lines (DL)
- Spirit Airlines (NK)
- Southwest Airlines (WN)
- Frontier (FL)
4. New York La Guardia – Chicago (LGA-ORD)
The fourth busiest domestic airline route in the United States operates between New York La Guardia Airport (LGA) and Chicago O’Hare International Airport (ORD), offering 283,592 seats. United Airlines (UA) dominates the Atlanta (ATL) to Orlando (MCO) route.
The airlines operating on these major domestic routes include:
- United Airlines (UA)
- Delta Air Lines (DL)
- Spirit Airlines (NK)
- American Airlines (AA)
5. New York JFK -Los Angeles (JFK-LAX)
The fifth busiest domestic route in the United States runs between New York’s John F. Kennedy International Airport (JFK) and Los Angeles International Airport (LAX). This route has 282,426 scheduled seats by the airlines.
Delta Airlines (DL) operates the most flights on this transcontinental route.
Airlines serving the JFK-LAX route include:
- JetBlue (B6)
- Delta Air Lines (DL)
- American Airlines (AA)
6. Honolulu – Kahului (HNL-OGG)
The sixth busiest domestic route connects Honolulu International Airport (HNL) to Kahului Airport (OGG) in Hawaii, offering 281,910 seats in October 2024.
This route ranks as the shortest among the top domestic routes in the United States.
7. Denver – Phoenix (DEN-PHX)
The seventh busiest domestic route in the United States operates between Denver International Airport (DEN) and Phoenix Sky Harbor International Airport (PHX), providing 277,221 seats in October 2024.
Southwest Airlines and United Airlines increased their capacity by adding 8,700 seats on this route. The flight duration between Denver and Phoenix averages 2 hours and 15 minutes.
8. Atlanta – New York La Guardia (ATL-LGA)
The eighth busiest domestic route in the United States connects Hartsfield-Jackson Atlanta International Airport (ATL) to New York’s La Guardia Airport (LGA), offering 261,878 scheduled seats in October 2024.
This route serves as a vital connection between the Southeast’s largest hub and New York City’s business-focused airport.
9. Denver – Las Vegas (DEN-LAS)
The ninth busiest domestic route in the United States operates between Denver International Airport (DEN) and Las Vegas Harry Reid International Airport (LAS), providing 247,461 scheduled seats in October 2024.
Flight frequencies on this route increase during weekends and holidays due to Las Vegas’s status as a leisure destination.
10. Denver – Chicago O’Hare (DEN-ORD)
The tenth busiest domestic route in the United States connects Denver International Airport (DEN) to Chicago O’Hare International Airport (ORD), offering 239,841 scheduled seats in October 2024.
The flight duration between Denver and Chicago O’Hare spans 2 hours and 45 minutes.
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