Atlanta (ATL) – Ontario, California (ONT)
- Distance
- 3,057 km
- 1,899 mi · 1,651 nm
- Flight time
- 4 h 32 min / 4 h 4 min
- Average gate to gate: ATL → ONT / back
- Time difference
- 3 h
- CO2 per passenger
- 384 kg
- One way, economy, incl. RF (227 kg CO2 only)
- Passengers / year
- 304,141
- Aug 2025 – Jul 2026 · −1.4%
- Flights / week
- 35
- Both directions, average
- Seats filled
- 87%
- 348,520 seats a year
- Airlines nonstop
- 1
- DL
Traffic: U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service), Aug 2025 – Jul 2026. Distance: WGS-84 ellipsoid. CO2: UK DESNZ 2026 factors. Sources
The way there
- Heading from ATL
- 280°
- Heading from ONT
- 81°
- Halfway point
- 34.99, -100.97
- Great-circle km
- 3,050 km (sphere, for EU261)
- In the air ATL → ONT
- 4 h 9 min
- In the air ONT → ATL
- 3 h 41 min
- Clocks
- Ontario, California is 3 h behind Atlanta
The estimate for a route without real times is 4 h 25 min; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 27,207 |
| Sep 2025 | 26,103 |
| Oct 2025 | 27,848 |
| Nov 2025 | 25,718 |
| Dec 2025 | 28,167 |
| Jan 2026 | 19,299 |
| Feb 2026 | 18,015 |
| Mar 2026 | 19,539 |
| Apr 2026 | 25,510 |
| May 2026 | 30,462 |
| Jun 2026 | 26,851 |
| Jul 2026 | 29,422 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 162 |
| Sep 2025 | 157 |
| Oct 2025 | 171 |
| Nov 2025 | 166 |
| Dec 2025 | 170 |
| Jan 2026 | 123 |
| Feb 2026 | 112 |
| Mar 2026 | 117 |
| Apr 2026 | 155 |
| May 2026 | 183 |
| Jun 2026 | 155 |
| Jul 2026 | 169 |
Airlines flying ATL–ONT nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| DLDelta Air Lines | 35 | 100% |
Both directions, Aug 2025 – Jul 2026. Airlines with at least one flight a month. U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service). Sources
Aircraft on this route
- Airbus Industrie A321Neoxlr · 1,834 flights
- Airbus Industrie A321-200n · 2 flights
- Boeing 737-800 · 1 flight
- Boeing B737 Max 900 · 1 flight
- Boeing B737 Max 800 · 1 flight
- Boeing 737-700/700LR/Max 7 · 1 flight
Also carried: 34 tonnes of freight and 0 tonnes of mail a year (passenger and cargo flights).
Punctuality
- On time
- 82.3%
- Arrived within 15 min of schedule
- Average delay
- 12 min
- Late arrivals count, early ones as 0
- Cancelled
- 1.8%
- Flights counted
- 1,874
- Aug 2025 – Jul 2026
Delay minutes by cause: airline 55% · aircraft arriving late 25% · air traffic system 15% · weather 3% · security 1%.
Both directions, Aug 2025 – Jul 2026. BTS Reporting Carrier On-Time Performance (US domestic flights of the larger US airlines). Sources
What passengers paid
- Average fare, Q1 2026
- $403
- One way, all cabins
- Average over a year
- $373
- Q2 2025 – Q1 2026
- Largest airline
- Delta Air Lines
- 68% of passengers · $451
- Lowest-fare airline
- Southwest Airlines
- 18% of passengers · $315
History, not a price to book: what the average passenger paid per one-way trip in each quarter (Q2 2025 $361 · Q3 2025 $370 · Q4 2025 $362 · Q1 2026 $403).
U.S. DOT Consumer Airfare Report, Table 1a (airline ticket sample, US domestic airport pairs). Sources
Delay compensation (EU261 / UK261)
Measured by great-circle distance: 3,050 km.
Neither EU261 nor UK261 covers this route: it neither starts nor ends in the EU, EEA, Switzerland or the UK. Other countries have their own rules (for example Canada's APPR or Brazil's ANAC rules).
Also owed for a cancellation with less than 14 days' notice or denied boarding. Not owed for extraordinary circumstances. On a connection, the distance to the final destination counts. From 23 October 2027 the EU's Regulation 2026/2202 applies; it keeps these amounts (what changes in 2027). Information, not legal advice.
Every airport pair between Atlanta and Ontario, California
Kilometres. Linked numbers have a page of their own. All Atlanta airports