Ontario to Atlanta ONT → ATL
Ontario International Airport (ONT) → Hartsfield-Jackson Atlanta International Airport (ATL)
The cheapest return found recently is $186 with Frontier Airlines, 12 Dec – 15 Dec, found 3 days ago. The cheapest one-way found recently is $267 with Alaska Airlines, 9 Jun 2027, found 4 days ago.
Return
Not enough comparable prices yet for a usual return price.
Cheapest return found recently
$186
12 Dec – 15 Dec · Frontier Airlines
Ontario International Airport (ONT) → Hartsfield-Jackson Atlanta International Airport (ATL)
Leaves 11:30 a.m. · Return leaves 7:12 a.m. · 30 h 9 min of travel, both ways together
out 1 stop, back 1 stop
found 3 days ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$186 12 Dec – 15 Decfound 3 days agoSee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 23 days, 26 Sept to 18 Oct, the cheapest return we saw each day was $186 to $308.
At $186, the cheapest return found recently is at the low end of that range.
23 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Not enough comparable prices yet: we hold return fares on 2 departure dates and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other 3-night return fares leaving within 3 days of 12 Dec to compare.
Every date we hold
2 fares on 2 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 2 Nov – 9 Nov | $260 | Frontier Airlines | Ontario International Airport (ONT) → Hartsfield-Jackson Atlanta International Airport (ATL) | out 1 stop, back nonstop | found 6 days ago | See prices for these dates |
| 12 Dec – 15 Dec | $186 | Frontier Airlines | Ontario International Airport (ONT) → Hartsfield-Jackson Atlanta International Airport (ATL) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
Which month looks cheapest?
December 2026 is the cheapest month — from $186.
Airlines on the cheapest dates: Frontier Airlines.
One-way
The cheapest one-way fare on each of 4 departure dates is usually $146 to $267.
Cheapest one-way found recently
$267
9 Jun 2027 · Alaska Airlines
Ontario International Airport (ONT) → Hartsfield-Jackson Atlanta International Airport (ATL)
Leaves 12:04 p.m. · 8 h 49 min trip
1 stop
found 4 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$267 9 Jun 2027found 4 days agoOpen this trip
$92 17 Novfound 6 days agoOpen this trip
What have prices looked like?
Over 21 days, 27 Sept to 18 Oct, the cheapest one-way we saw each day was $82 to $162.
At $267, the cheapest one-way found recently is above that range.
21 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 4 departure dates from 17 Nov to 9 Jun 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
No. We hold one-way fares on 1 other departure date within 3 days of 9 Jun 2027, and it is not cheaper.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 17 Nov | $92 | Frontier Airlines | Ontario International Airport (ONT) → Hartsfield-Jackson Atlanta International Airport (ATL) | 1 stop | found 6 days ago | Open this trip |
| 8 Feb 2027 | $164 | Frontier Airlines | Ontario International Airport (ONT) → Hartsfield-Jackson Atlanta International Airport (ATL) | 1 stop | found 5 days ago | Open this trip |
| 8 Jun 2027 | $267 | Alaska Airlines | Ontario International Airport (ONT) → Hartsfield-Jackson Atlanta International Airport (ATL) | 1 stop | found 4 days ago | Open this trip |
| 9 Jun 2027 | $267 | Alaska Airlines | Ontario International Airport (ONT) → Hartsfield-Jackson Atlanta International Airport (ATL) | 1 stop | found 4 days ago | Open this trip |
Which month looks cheapest?
November 2026 is the cheapest month — from $92.
Airlines on the cheapest dates: Frontier Airlines, Alaska Airlines.
Premium cabin fares from Ontario to Atlanta
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 12 Dec – 15 Dec in another cabin: Premium economy · Business · First
Today's prices for 9 Jun 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ontario to Atlanta?
Return
Fares 30 to 59 days before departure were typically 19% lower than 7 to 13 days before departure.
From the cheapest return each day between 26 Sept and 18 Oct (23 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 7–13 days | $295 | $295 | +24% | 8 |
| 14–29 days | $253 | $245 | +6% | 19 |
| 30–59 days | $238 | $186 | Cheapest seen | 18 |
| 60–89 days | $356 | $356 | +50% | 7 |
One-way
The cheapest fares were 30 to 59 days before departure.
From the cheapest one-way each day between 27 Sept and 18 Oct (21 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 30–59 days | $82 | $82 | Cheapest seen | 9 |
| 60–89 days | $91 | $91 | +11% | 13 |
| 90–179 days | $163 | $117 | +99% | 18 |
| 180+ days | $298 | $257 | +263% | 15 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Los Angeles → Atlanta
56 km from Ontario
$325
$139 more than flying from Ontario
24 Oct – 28 Oct · LAX → ATL · out 1 stop, back 1 stop
found today
Long Beach → Atlanta
60 km from Ontario
$518
$332 more than flying from Ontario
12 Dec – 15 Dec · LGB → ATL · out 1 stop, back 1 stop
found 3 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Los Angeles → Atlanta
56 km from Ontario
$234
$33 less than flying from Ontario
9 Jun 2027 · LAX → ATL · 1 stop
found 4 days ago
Long Beach → Atlanta
60 km from Ontario
$272
$5 more than flying from Ontario
8 Jun 2027 · LGB → ATL · 1 stop
found 4 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 12 Dec – 15 Dec. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work