Miami to Ontario MIA → ONT
Miami International Airport (MIA) → Ontario International Airport (ONT)
The cheapest return found recently is $466 with Frontier Airlines, 21 Oct – 22 Oct, found today. The cheapest one-way found recently is $174 with Frontier Airlines, 28 Jan 2027, found 6 days ago.
Return
The cheapest return fare on each of 5 departure dates is usually $403 to $442.
Cheapest return found recently
$466
21 Oct – 22 Oct · Frontier Airlines
Miami International Airport (MIA) → Ontario International Airport (ONT)
Leaves 5:50 a.m. · Return leaves 11:52 a.m. · 17 h 34 min of travel, both ways together
out 1 stop, back 1 stop
found today
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$466 21 Oct – 22 Octfound todaySee prices for these dates
$366 27 Oct – 17 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 $198 to $530.
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 5 departure dates from 20 Oct to 27 Oct, 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?
Yes. Among 1-night return fares leaving within 3 days of 21 Oct, 23 Oct – 24 Oct costs $413: $53 less than the cheapest found recently.
Frontier Airlines · Miami International Airport (MIA) → Ontario International Airport (ONT) · out 1 stop, back 1 stop · found 3 days ago
Every date we hold
5 fares on 5 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 20 Oct – 21 Oct | $442 | Frontier Airlines | Miami International Airport (MIA) → Ontario International Airport (ONT) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 21 Oct – 22 Oct | $466 | Frontier Airlines | Miami International Airport (MIA) → Ontario International Airport (ONT) | out 1 stop, back 1 stop | found today | See prices for these dates |
| 23 Oct – 24 Oct | $413 | Frontier Airlines | Miami International Airport (MIA) → Ontario International Airport (ONT) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 24 Oct – 25 Oct | $403 | Frontier Airlines | Miami International Airport (MIA) → Ontario International Airport (ONT) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 27 Oct – 17 Nov | $366 | Frontier Airlines | Miami International Airport (MIA) → Ontario International Airport (ONT) | out 1 stop, back 3 stops | found 3 days ago | See prices for these dates |
Airlines on the cheapest dates: Frontier Airlines.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$174
28 Jan 2027 · Frontier Airlines
Miami International Airport (MIA) → Ontario International Airport (ONT)
Leaves 5:50 a.m. · 21 h 15 min trip
1 stop
found 6 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$174 28 Jan 2027found 6 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 18 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $86 to $279.
18 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?
Not enough comparable prices yet: we hold one-way fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 28 Jan 2027 to compare.
Every date we hold
1 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 28 Jan 2027 | $174 | Frontier Airlines | Miami International Airport (MIA) → Ontario International Airport (ONT) | 1 stop | found 6 days ago | Open this trip |
Airlines on the cheapest dates: Frontier Airlines.
Premium cabin fares from Miami to Ontario
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 21 Oct – 22 Oct in another cabin: Premium economy · Business · First
Today's prices for 28 Jan 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Miami to Ontario?
Return
Not enough history yet: in 25 days of return prices, 24 Sept to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
One-way
Not enough history yet: in 18 days of one-way prices, 24 Sept to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Miami → Los Angeles
56 km from Ontario
$393
$73 less than flying to Ontario
26 Oct – 31 Oct · MIA → LAX · out 1 stop, back 1 stop
found yesterday
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Miami → Los Angeles
56 km from Ontario
$226
$52 more than flying to Ontario
10 Jun 2027 · MIA → LAX · 1 stop
found yesterday
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 21 Oct – 22 Oct. 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