Cheap flights from Salt Lake City to Ontario from $42 SLC → ONT
Salt Lake City International Airport (SLC) → Ontario International Airport (ONT)
The cheapest return found recently is $84 with Frontier Airlines, 1 Dec – 8 Dec, found 5 days ago. The cheapest one-way found recently is $42 with Frontier Airlines, 15 Dec, found 4 days ago.
- Cheapest one-way found recently
- $42, found 4 days ago
- Cheapest return found recently
- $84, 1 Dec to 8 Dec
- Cheapest month to fly
- December 2026, one-way fares from $42 found in the last 7 days
Return
Not enough comparable prices yet for a usual return price.
Cheapest return found recently
$84
1 Dec – 8 Dec · Frontier Airlines
Salt Lake City International Airport (SLC) → Ontario International Airport (ONT)
Leaves 2:07 p.m. · Return leaves 7:41 p.m. · 21 h 43 min of travel, both ways together
out 1 stop, back 1 stop
found 5 days ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$84 1 Dec – 8 Decfound 5 days agoSee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 12 days, 6 Oct to 11 Nov, the cheapest return we saw each day was $84 to $404.
At $84, the cheapest return found recently is at the low end of that range.
12 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 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other 7-night return fares leaving within 3 days of 1 Dec to compare.
Every date we hold
1 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 1 Dec – 8 Dec | $84 | Frontier Airlines | Salt Lake City International Airport (SLC) → Ontario International Airport (ONT) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
Airlines on the cheapest dates: Frontier Airlines.
One-way
The cheapest one-way fare on each of 4 departure dates is usually $60 to $142.
Cheapest one-way found recently
$42
15 Dec · Frontier Airlines
Salt Lake City International Airport (SLC) → Ontario International Airport (ONT)
Leaves 2:16 p.m. · 5 h 15 min trip
1 stop
found 4 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$42 15 Decfound 4 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 40 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $42 to $218.
At $42, the cheapest one-way found recently is at the low end of that range.
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 23 Nov to 1 Mar 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 15 Dec to compare.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 23 Nov | $140 | Frontier Airlines | Salt Lake City International Airport (SLC) → Ontario International Airport (ONT) | 1 stop | found 5 days ago | Open this trip |
| 24 Nov | $147 | Frontier Airlines | Salt Lake City International Airport (SLC) → Ontario International Airport (ONT) | 1 stop | found 5 days ago | Open this trip |
| 15 Dec | $42 | Frontier Airlines | Salt Lake City International Airport (SLC) → Ontario International Airport (ONT) | 1 stop | found 4 days ago | Open this trip |
| 1 Mar 2027 | $66 | Frontier Airlines | Salt Lake City International Airport (SLC) → Ontario International Airport (ONT) | 1 stop | found 6 days ago | Open this trip |
Which month looks cheapest?
December 2026 is the cheapest month — from $42.
Airlines on the cheapest dates: Frontier Airlines.
Premium cabin fares from Salt Lake City 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 1 Dec – 8 Dec in another cabin: Premium economy · Business · First
Today's prices for 15 Dec in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Salt Lake City to Ontario?
Return
Not enough history yet: in 12 days of return prices, 6 Oct to 11 Nov, fewer than 3 booking ranges had prices on 7 days or more.
One-way
Fares 30 to 59 days before departure were typically 77% lower than 0 to 6 days before departure.
From the cheapest one-way each day between 24 Sept and 11 Nov (40 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 | $205 | $136 | +336% | 16 |
| 7–13 days | $140 | $128 | +198% | 9 |
| 14–29 days | $156 | $128 | +232% | 11 |
| 30–59 days | $47 | $42 | Cheapest seen | 16 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Salt Lake City → Los Angeles
56 km from Ontario
$355
$271 more than flying to Ontario
23 Nov – 29 Nov · SLC → LAX · out 1 stop, back nonstop
found 5 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 1 Dec – 8 Dec. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Salt Lake City to Ontario?
The cheapest return found recently is $84 with Frontier Airlines, 1 Dec to 8 Dec, found 5 days ago.
How much is a one-way flight from Salt Lake City to Ontario?
The cheapest one-way found recently is $42 with Frontier Airlines, 15 Dec, found 4 days ago. The cheapest one-way fare on each of 4 departure dates is usually $60 to $142.
What is the cheapest month to fly from Salt Lake City to Ontario?
December 2026 is the cheapest month for a one-way, from $42, 15 Dec, found 4 days ago.
How far ahead should I book a flight from Salt Lake City to Ontario?
In 40 days of prices between 24 Sept and 11 Nov, one-way fares 30 to 59 days before departure were typically 77% lower than 0 to 6 days before departure.
How long is the flight from Salt Lake City to Ontario?
The cheapest one-way found recently, with Frontier Airlines on 15 Dec, takes 5 h 15 min with 1 stop.
Which airlines have the cheapest flights from Salt Lake City to Ontario?
Between 23 Nov and 1 Mar 2027, Frontier Airlines has the cheapest one-way on all 4 departure dates we hold.
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