Ontario to Miami ONT → MIA
Ontario International Airport (ONT) → Miami International Airport (MIA)
The cheapest return found recently is $506 with Southwest Airlines, 28 Dec – 6 Jan 2027, found yesterday. The cheapest one-way found recently is $321 with Southwest Airlines, 18 Dec, found 2 days ago.
Return
The cheapest return fare on each of 17 departure dates is usually $376 to $535.
Cheapest return found recently
$506
28 Dec – 6 Jan 2027 · Southwest Airlines
Ontario International Airport (ONT) → Miami International Airport (MIA)
Leaves 9:35 p.m. · Return leaves 8:14 a.m. · 41 h 16 min of travel, both ways together
out 1 stop, back 1 stop
found yesterday
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$506 28 Dec – 6 Jan 2027found yesterdaySee prices for these dates
$311 7 Nov – 14 Novfound 3 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $227 to $311.
At $506, the cheapest return found recently is above that range.
25 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?
Compared with the cheapest return fare on each of 17 departure dates from 25 Oct to 10 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?
We hold no other 9-night return fares leaving within 3 days of 28 Dec to compare.
Every date we hold
18 fares on 17 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 25 Oct – 29 Oct | $376 | Frontier Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 31 Oct – 2 Nov | $323 | Frontier Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 1 Nov – 4 Nov | $376 | Frontier Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 4 Nov – 9 Nov | $397 | Frontier Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
| 5 Nov – 9 Nov | $387 | Frontier Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 7 Nov – 14 Nov | $311 | Frontier Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 17 Dec – 8 Jan 2027 | $473 | Southwest Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
| 21 Dec – 24 Dec | $370 | Frontier Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 26 Dec – 29 Dec | $547 | Frontier Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 28 Dec – 6 Jan 2027 | $506 | Southwest Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 2 Jan 2027 – 9 Jan 2027 | $551 | American Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 3 stops | found 4 days ago | See prices for these dates |
| 8 Jan 2027 – 16 Jan 2027 | $465 | Southwest Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 9 Jan 2027 – 16 Jan 2027 | $408 | Southwest Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 25 Mar 2027 – 29 Mar 2027 | $641 | United Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found today | See prices for these dates |
| 26 Mar 2027 – 15 Apr 2027 | $513 | Southwest Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 9 May 2027 – 14 May 2027 | $535 | Southwest Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 10 Jun 2027 – 17 Jun 2027 | $581 | American Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | out 1 stop, back nonstop | found 3 days ago | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $311.
Airlines on the cheapest dates: Frontier Airlines, Southwest Airlines, American Airlines, United Airlines.
One-way
The cheapest one-way fare on each of 6 departure dates is usually $181 to $223.
Cheapest one-way found recently
$321
18 Dec · Southwest Airlines
Ontario International Airport (ONT) → Miami International Airport (MIA)
Leaves 1:05 p.m. · 6 h 50 min trip
1 stop
found 2 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$321 18 Decfound 2 days agoOpen this trip
$154 23 Octfound 4 days agoOpen this trip
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $116 to $192.
At $321, the cheapest one-way found recently is above that range.
25 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 6 departure dates from 23 Oct to 4 Feb 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?
We hold no other one-way fares leaving within 3 days of 18 Dec to compare.
Every date we hold
7 fares on 6 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 23 Oct | $154 | Southwest Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | stops unknown | found 4 days ago | Open this trip |
| 27 Nov | $177 | Frontier Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | 1 stop | found 6 days ago | Open this trip |
| 18 Dec | $321 | Southwest Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | 1 stop | found 2 days ago | Open this trip |
| 30 Jan 2027 | $207 | Frontier Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | 1 stop | found 4 days ago | Open this trip |
| 2 Feb 2027 | $228 | Frontier Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | 1 stop | found 4 days ago | Open this trip |
| 4 Feb 2027 | $192 | Frontier Airlines | Ontario International Airport (ONT) → Miami International Airport (MIA) | 1 stop | found 3 days ago | Open this trip |
Which month looks cheapest?
October 2026 is the cheapest month — from $154.
Airlines on the cheapest dates: Frontier Airlines, Southwest Airlines.
Premium cabin fares from Ontario to Miami
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 28 Dec – 6 Jan 2027 in another cabin: Premium economy · Business · First
Today's prices for 18 Dec in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ontario to Miami?
Return
Fares 30 to 59 days before departure were typically 37% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 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 |
|---|---|---|---|---|
| 0–6 days | $465 | $298 | +59% | 24 |
| 7–13 days | $344 | $251 | +17% | 19 |
| 14–29 days | $301 | $236 | +3% | 25 |
| 30–59 days | $293 | $227 | Cheapest seen | 18 |
| 60–89 days | $360 | $297 | +23% | 25 |
| 90–179 days | $407 | $391 | +39% | 25 |
| 180+ days | $494 | $440 | +69% | 19 |
One-way
The cheapest fares were 14 to 29 days before departure.
From the cheapest one-way each day between 24 Sept and 18 Oct (25 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 |
|---|---|---|---|---|
| 14–29 days | $117 | $116 | Cheapest seen | 8 |
| 30–59 days | $177 | $123 | +51% | 24 |
| 60–89 days | $184 | $184 | +57% | 19 |
| 90–179 days | $207 | $141 | +77% | 21 |
| 180+ days | $233 | $229 | +99% | 23 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Los Angeles → Miami
56 km from Ontario
$421
$85 less than flying from Ontario
28 Dec – 6 Jan 2027 · LAX → MIA · out 1 stop, back nonstop
found 18 hours ago
Long Beach → Miami
60 km from Ontario
$610
$104 more than flying from Ontario
9 May 2027 – 14 May 2027 · LGB → MIA · out 1 stop, back 1 stop
found yesterday
Ontario → Fort Lauderdale
40 km from Miami
$440
$66 less than flying to Miami
18 Nov – 22 Nov · ONT → FLL · out 1 stop, back nonstop
found 2 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Los Angeles → Miami
56 km from Ontario
$160
$161 less than flying from Ontario
26 Nov · LAX → MIA · 1 stop
found 4 hours ago
Long Beach → Miami
60 km from Ontario
$237
$84 less than flying from Ontario
17 Feb 2027 · LGB → MIA · 1 stop
found 2 days ago
Ontario → Fort Lauderdale
40 km from Miami
$305
$16 less than flying to Miami
1 Jun 2027 · ONT → FLL · 1 stop
found today
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 28 Dec – 6 Jan 2027. 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