Airport
Ontario International Airport
ONT · Ontario, CA
- IATA Code
- ONT
- ICAO Code
- KONT
- City
- Ontario
- Country
- United States
- Website
- www.flyontario.com
Ontario International Airport is a major airport serving Ontario, CA. Its IATA code is ONT and its ICAO code is KONT.
The airfield sits 944 feet above sea level.
Below you'll find official on-time statistics, current weather and delays, nearby aircraft and traveler reviews. Flown through ONT recently? Share your experience to help other travelers.
ONT by the numbers
IATA ONT · ICAO KONT · 944 ft elevation · Map
Loading live weather, forecasts, delays and nearby aircraft…
Official departure punctuality
Ranks #157 of 358 U.S. airports for on-time departures
- On-time departures
- 80.8%
- Less than 15 minutes late
- Cancelled
- 0.9%
- Of scheduled flights
- Average delay when late
- 73 min
- Flights arriving 15+ minutes late
- Flights tracked
- 25,791
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 42%
- Airline (crew, maintenance, cleaning) 34%
- Air traffic control & airport 22%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Busiest routes from ONT
| Route | Flights | On time |
|---|---|---|
| Phoenix (PHX) | 3,011 | 82% |
| Denver (DEN) | 2,624 | 82% |
| Seattle (SEA) | 2,488 | 86% |
| Las Vegas (LAS) | 2,469 | 76% |
| Dallas-Fort Worth (DFW) | 2,274 | 81% |
| Sacramento (SMF) | 2,119 | 85% |
| Oakland (OAK) | 1,450 | 86% |
| San Francisco (SFO) | 1,335 | 61% |
| San Jose (SJC) | 1,320 | 86% |
| Salt Lake City (SLC) | 1,239 | 91% |
Airlines departing ONT
| Airline | Flights | On-time departures |
|---|---|---|
| Southwest Airlines | 11,643 | 77% |
| American Airlines | 3,545 | 83% |
| United Airlines | 2,429 | 83% |
| Frontier Airlines | 2,284 | 77% |
| Alaska Airlines | 2,098 | 86% |
| Delta Air Lines | 1,811 | 88% |
| SkyWest Airlines | 1,771 | 89% |
| JetBlue Airways | 165 | 58% |
| Envoy Air | 45 | 93% |
Runways
| Runway | Length | Surface |
|---|---|---|
| 08L/26R | 12,197 ft | CON, lighted |
| 08R/26L | 10,200 ft | CON, lighted |
Listen to the tower
Air traffic control frequencies, for scanners and airband radios.
- Recorded airport information (ATIS) 124.250 MHz
- Tower 120.600 MHz
- Ground 121.900 MHz
- Clearance delivery 118.100 MHz
Runways and frequencies: OurAirports (public domain). Not for navigation.
Tags: ONT, KONT, Ontario airport, Ontario International Airport
Reviews
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