Home / Flights / Ontario

Last updated :

Flights Ontario — Prices and error fares

Flight to Ontario from $50. 93 active deal(s) and 872 archived error fare(s) on this route.
Source: Faro data, updated on 30/09/2026.

Key point: Error fares to Ontario are detected automatically. According to Faro data (2025), they last 4 to 6 hours on average before the airline corrects them.

Your rights as an air passenger are protected by EU Regulation EC 261/2004.

When to fly cheaper

The most important factor is not the booking day but the departure month. On this route the gap between the cheapest and priciest month often exceeds 40%. The table below draws on 872 genuinely archived deals (Faro, 2026): every row holds at least three observations, and months below that threshold are left out.

The cheapest month observed is September, from €35 (184 deals observed). The priciest is March, averaging €377.

Month Deals Min Average
January 39 88€ 316€
February 26 125€ 312€
March 15 195€ 377€
June 53 47€ 227€
July 42 61€ 220€
August 52 48€ 199€
September 184 35€ 182€
October 241 38€ 188€
November 133 89€ 268€
December 87 83€ 301€

Price tracking by route

These routes to Ontario have their own tracking page: usual price, 30-day history, cheapest months and record low.
San Francisco → Ontario · 56 readings Las Vegas → Ontario · 54 readings Denver → Ontario · 33 readings Phoenix → Ontario · 38 readings Chicago → Ontario · 61 readings Houston → Ontario · 62 readings Atlanta → Ontario · 38 readings Washington → Ontario · 59 readings Seattle → Ontario · 57 readings Dallas → Ontario · 63 readings

Active deals to Ontario

Here are the active error fares to Ontario. 93 deal(s) available right now — fares change every 30 minutes.
Price seen 42min ago -82%
San Francisco (SFO) → 🇺🇸 Ontario (ONT)
6 nov – 9 nov ·3 days
$50 $269
Book →
Price seen 34h ago -73%
Las Vegas (LAS) → 🇺🇸 Ontario (ONT)
12 oct – 20 oct ·8 days
$73 $275
Book →
Price seen 42min ago -72%
San Francisco (SFO) → 🇺🇸 Ontario (ONT)
31 oct – 5 nov ·5 days
$77 $271
Book →
Price seen 42min ago -72%
Denver (DEN) → 🇺🇸 Ontario (ONT)
26 oct – 29 oct ·3 days
$77 $272
Book →
Price seen 42min ago -67%
Phoenix (PHX) → 🇺🇸 Ontario (ONT)
12 déc – 14 déc ·2 days
$91 $273
Book →
Price seen 42min ago -65%
Las Vegas (LAS) → 🇺🇸 Ontario (ONT)
24 déc – 5 jan ·12 days
$96 $273
Book →
Price seen 1h ago -64%
Las Vegas (LAS) → 🇺🇸 Ontario (ONT)
23 oct – 27 oct ·4 days
$99 $273
Book →
Price seen 23h ago -62%
San Francisco (SFO) → 🇺🇸 Ontario (ONT)
1 nov – 5 nov ·4 days
$104 $275
Book →
Price seen 10h ago -62%
San Francisco (SFO) → 🇺🇸 Ontario (ONT)
3 nov – 5 nov ·2 days
$105 $273
Book →
Price seen 42min ago -50%
Las Vegas (LAS) → 🇺🇸 Ontario (ONT)
16 jan – 24 jan ·8 days
$136 $273
Book →
Price seen 10h ago -50%
Denver (DEN) → 🇺🇸 Ontario (ONT)
13 fév – 15 fév ·2 days
$136 $273
Book →
Price seen 40min ago -50%
Chicago (CHI) → 🇺🇸 Ontario (ONT)
30 oct – 1 nov ·2 days
$137 $274
Book →
Price seen 42min ago -49%
Las Vegas (LAS) → 🇺🇸 Ontario (ONT)
23 nov – 28 nov ·5 days
$140 $273
Book →
Price seen 3h ago -48%
Chicago (CHI) → 🇺🇸 Ontario (ONT)
2 oct – 6 oct ·4 days
$144 $274
Book →
Price seen 6h ago -45%
Houston (IAH) → 🇺🇸 Ontario (ONT)
12 oct – 20 oct ·8 days
$151 $273
Book →
Price seen 42min ago -44%
Atlanta (ATL) → 🇺🇸 Ontario (ONT)
21 oct – 28 oct ·7 days
$154 $274
Book →
Price seen 10h ago -43%
Phoenix (PHX) → 🇺🇸 Ontario (ONT)
17 oct – 18 oct ·1 days
$156 $273
Book →
Price seen 42min ago -43%
San Francisco (SFO) → 🇺🇸 Ontario (ONT)
20 déc – 22 déc ·2 days
$157 $273
Book →
Price seen 42min ago -42%
Houston (IAH) → 🇺🇸 Ontario (ONT)
30 oct – 3 nov ·4 days
$160 $273
Book →
Price seen 6h ago -42%
Chicago (CHI) → 🇺🇸 Ontario (ONT)
14 oct – 24 oct ·10 days
$160 $273
Book →
Price seen 41min ago -41%
Washington (WAS) → 🇺🇸 Ontario (ONT)
19 oct – 26 oct ·7 days
$163 $274
Book →
Price seen 42min ago -40%
Seattle (SEA) → 🇺🇸 Ontario (ONT)
24 oct – 26 oct ·2 days
$165 $273
Book →
Price seen 41min ago -37%
Phoenix (PHX) → 🇺🇸 Ontario (ONT)
10 oct – 12 oct ·2 days
$174 $274
Book →
Price seen 6h ago -36%
Washington (WAS) → 🇺🇸 Ontario (ONT)
10 oct – 14 oct ·4 days
$176 $273
Book →
Price seen 3h ago -34%
Phoenix (PHX) → 🇺🇸 Ontario (ONT)
16 oct – 18 oct ·2 days
$181 $273
Book →
Price seen 42min ago -32%
Chicago (CHI) → 🇺🇸 Ontario (ONT)
28 oct – 4 nov ·7 days
$187 $274
Book →
Price seen 41min ago -30%
Chicago (CHI) → 🇺🇸 Ontario (ONT)
5 nov – 13 nov ·8 days
$193 $274
Book →
Price seen 3h ago -27%
Dallas (DFW) → 🇺🇸 Ontario (ONT)
17 oct – 18 oct ·1 days
$201 $274
Book →
Price seen 42min ago -27%
Houston (IAH) → 🇺🇸 Ontario (ONT)
20 jan – 29 jan ·9 days
$201 $274
Book →
Price seen 42min ago -24%
Orlando (MCO) → 🇺🇸 Ontario (ONT)
9 oct – 11 oct ·2 days
$208 $273
Book →
Price seen 41min ago -19%
San Francisco (SFO) → 🇺🇸 Ontario (ONT)
1 déc – 4 déc ·3 days
$224 $274
Book →
Price seen 41min ago -19%
Washington (WAS) → 🇺🇸 Ontario (ONT)
9 oct – 13 oct ·4 days
$224 $274
Book →
Price seen 42min ago -18%
Houston (IAH) → 🇺🇸 Ontario (ONT)
23 nov – 28 nov ·5 days
$225 $273
Book →
Price seen 42min ago -17%
Dallas (DFW) → 🇺🇸 Ontario (ONT)
24 nov – 29 nov ·5 days
$227 $273
Book →
Price seen 42min ago -16%
Seattle (SEA) → 🇺🇸 Ontario (ONT)
28 nov – 2 déc ·4 days
$231 $274
Book →
Price seen 42min ago -16%
Atlanta (ATL) → 🇺🇸 Ontario (ONT)
6 nov – 9 nov ·3 days
$231 $274
Book →
Price seen 42min ago -14%
New York (NYC) → 🇺🇸 Ontario (ONT)
14 oct – 24 oct ·10 days
$235 $273
Book →
Price seen 42min ago -13%
New York (NYC) → 🇺🇸 Ontario (ONT)
17 nov – 23 nov ·6 days
$238 $273
Book →
Price seen 41min ago -13%
Denver (DEN) → 🇺🇸 Ontario (ONT)
25 nov – 30 nov ·5 days
$240 $274
Book →
Price seen 42min ago -12%
Fort Lauderdale (FLL) → 🇺🇸 Ontario (ONT)
17 oct – 31 oct ·14 days
$241 $273
Book →
Price seen 40min ago -12%
Las Vegas (LAS) → 🇺🇸 Ontario (ONT)
2 oct – 2 oct
$242 $274
Book →
Price seen 42min ago -9%
San Francisco (SFO) → 🇺🇸 Ontario (ONT)
7 mar – 12 mar ·5 days
$249 $272
Book →
Price seen 41min ago -9%
Philadelphia (PHL) → 🇺🇸 Ontario (ONT)
25 déc – 31 déc ·6 days
$251 $274
Book →
Price seen 42min ago -3%
Dallas (DFW) → 🇺🇸 Ontario (ONT)
16 oct – 18 oct ·2 days
$266 $273
Book →
Price seen 42min ago -1%
Denver (DEN) → 🇺🇸 Ontario (ONT)
18 déc – 20 déc ·2 days
$271 $273
Book →
Price seen 20h ago
Atlanta (ATL) → 🇺🇸 Ontario (ONT)
1 fév – 4 fév ·3 days
$273
Book →
Price seen 42min ago
Washington (WAS) → 🇺🇸 Ontario (ONT)
20 nov – 29 nov ·9 days
$274
Book →
Price seen 42min ago
Miami (MIA) → 🇺🇸 Ontario (ONT)
21 oct – 28 oct ·7 days
$274 $276
Book →
Price seen 42min ago
New York (NYC) → 🇺🇸 Ontario (ONT)
3 déc – 8 déc ·5 days
$284
Book →
Price seen 42min ago
Seattle (SEA) → 🇺🇸 Ontario (ONT)
13 déc – 18 déc ·5 days
$292
Book →
Price seen 42min ago
Fort Lauderdale (FLL) → 🇺🇸 Ontario (ONT)
10 nov – 21 nov ·11 days
$293
Book →
Price seen 42min ago
Philadelphia (PHL) → 🇺🇸 Ontario (ONT)
26 nov – 3 déc ·7 days
$299
Book →
Price seen 42min ago
Dallas (DFW) → 🇺🇸 Ontario (ONT)
19 déc – 27 déc ·8 days
$300
Book →
Price seen 42min ago
New York (NYC) → 🇺🇸 Ontario (ONT)
20 jan – 27 jan ·7 days
$301
Book →
Price seen 42min ago
Houston (IAH) → 🇺🇸 Ontario (ONT)
15 déc – 3 jan ·19 days
$305
Book →
Price seen 29h ago
New York (NYC) → 🇺🇸 Ontario (ONT)
2 fév – 9 fév ·7 days
$306
Book →
Price seen 42min ago
Boston (BOS) → 🇺🇸 Ontario (ONT)
29 oct – 1 nov ·3 days
$312
Book →
Price seen 15h ago
Chicago (CHI) → 🇺🇸 Ontario (ONT)
23 déc – 31 déc ·8 days
$321
Book →
Price seen 5h ago
Houston (IAH) → 🇺🇸 Ontario (ONT)
18 déc – 30 déc ·12 days
$322
Book →
Price seen 42min ago
Chicago (CHI) → 🇺🇸 Ontario (ONT)
20 déc – 29 déc ·9 days
$327
Book →
Price seen 15h ago
San Diego (SAN) → 🇺🇸 Ontario (ONT)
12 déc – 9 jan ·28 days
$328
Book →
Price seen 42min ago
Denver (DEN) → 🇺🇸 Ontario (ONT)
24 nov – 29 nov ·5 days
$329
Book →
Price seen 42min ago
Phoenix (PHX) → 🇺🇸 Ontario (ONT)
2 oct – 3 oct ·1 days
$334
Book →
Price seen 42min ago
New York (NYC) → 🇺🇸 Ontario (ONT)
10 mar – 13 mar ·3 days
$338
Book →
Price seen 3h ago
Philadelphia (PHL) → 🇺🇸 Ontario (ONT)
6 jan – 10 jan ·4 days
$341
Book →
Price seen 42min ago
Miami (MIA) → 🇺🇸 Ontario (ONT)
27 jan – 30 jan ·3 days
$353
Book →
Price seen 42min ago
Atlanta (ATL) → 🇺🇸 Ontario (ONT)
1 jan – 4 jan ·3 days
$356
Book →
Price seen 27h ago
Fort Lauderdale (FLL) → 🇺🇸 Ontario (ONT)
3 nov – 10 nov ·7 days
$357
Book →
Price seen 11h ago
Boston (BOS) → 🇺🇸 Ontario (ONT)
15 nov – 22 nov ·7 days
$362
Book →
Price seen 42min ago
Philadelphia (PHL) → 🇺🇸 Ontario (ONT)
1 déc – 6 déc ·5 days
$366
Book →
Price seen 11h ago
Boston (BOS) → 🇺🇸 Ontario (ONT)
6 jan – 9 jan ·3 days
$367
Book →
Price seen 28h ago
Washington (WAS) → 🇺🇸 Ontario (ONT)
20 nov – 28 nov ·8 days
$375
Book →
Price seen 42min ago
Boston (BOS) → 🇺🇸 Ontario (ONT)
10 déc – 13 déc ·3 days
$377
Book →
Price seen 42min ago
Orlando (MCO) → 🇺🇸 Ontario (ONT)
14 déc – 18 déc ·4 days
$380
Book →
Price seen 42min ago
San Diego (SAN) → 🇺🇸 Ontario (ONT)
5 oct – 12 oct ·7 days
$383
Book →
Price seen 42min ago
Boston (BOS) → 🇺🇸 Ontario (ONT)
11 jan – 14 jan ·3 days
$383
Book →
Price seen 24h ago
Houston (IAH) → 🇺🇸 Ontario (ONT)
25 nov – 29 nov ·4 days
$388
Book →
Price seen 50h ago
Boston (BOS) → 🇺🇸 Ontario (ONT)
1 déc – 4 déc ·3 days
$394
Book →
Price seen 43h ago
Washington (WAS) → 🇺🇸 Ontario (ONT)
31 déc – 4 jan ·4 days
$397
Book →
Price seen 27h ago
San Diego (SAN) → 🇺🇸 Ontario (ONT)
2 oct – 9 oct ·7 days
$400
Book →
Price seen 29h ago
Fort Lauderdale (FLL) → 🇺🇸 Ontario (ONT)
1 fév – 4 fév ·3 days
$402
Book →
Price seen 29h ago
Boston (BOS) → 🇺🇸 Ontario (ONT)
1 fév – 4 fév ·3 days
$402
Book →
Price seen 42min ago
Miami (MIA) → 🇺🇸 Ontario (ONT)
26 nov – 29 nov ·3 days
$407
Book →
Price seen 29h ago
Houston (IAH) → 🇺🇸 Ontario (ONT)
19 fév – 5 mar ·14 days
$421
Book →
Price seen 42min ago
Boston (BOS) → 🇺🇸 Ontario (ONT)
20 nov – 27 nov ·7 days
$426
Book →
Price seen 42min ago
Washington (WAS) → 🇺🇸 Ontario (ONT)
18 déc – 28 déc ·10 days
$442
Book →
Price seen 40h ago
Miami (MIA) → 🇺🇸 Ontario (ONT)
18 jan – 21 jan ·3 days
$450
Book →
Price seen 42min ago
Fort Lauderdale (FLL) → 🇺🇸 Ontario (ONT)
1 jan – 4 jan ·3 days
$454
Book →
Price seen 42min ago
Fort Lauderdale (FLL) → 🇺🇸 Ontario (ONT)
1 mar – 4 mar ·3 days
$472
Book →
Price seen 42min ago
Houston (IAH) → 🇺🇸 Ontario (ONT)
12 mar – 26 mar ·14 days
$540
Book →
Price seen 29h ago
Washington (WAS) → 🇺🇸 Ontario (ONT)
12 fév – 16 fév ·4 days
$588
Book →
Price seen 42min ago
Washington (WAS) → 🇺🇸 Ontario (ONT)
19 mar – 22 mar ·3 days
$613
Book →
Price seen 42min ago
Miami (MIA) → 🇺🇸 Ontario (ONT)
19 mar – 22 mar ·3 days
$629
Book →

Price history to Ontario

Every error fare detected by Faro to this destination. Time-stamped, verifiable data. (Source: Faro data, updated on 30/09/2026.)
DateDeparturePriceNormalOffDurationAirline
27/09/2026 Miami $508 $0 -0% 64h
03/09/2026 New York $229 $274 -16% 647h
21/09/2026 Boston $349 $0 -0% 196h
25/09/2026 Phoenix $114 $275 -58% 100h
19/09/2026 Dallas $387 $0 -0% 249h
20/09/2026 Fort Lauderdale $238 $273 -13% 218h
20/09/2026 Philadelphie $264 $273 -3% 217h
24/09/2026 Dallas $231 $269 -14% 134h
22/09/2026 Atlanta $285 $0 -0% 161h
25/09/2026 New York $387 $0 -0% 90h
22/09/2026 Miami $462 $0 -0% 162h
20/09/2026 Chicago $187 $273 -32% 218h
27/09/2026 IAH $297 $0 -0% 50h
08/09/2026 IAH $170 $275 -38% 510h
20/09/2026 MCO $416 $0 -0% 218h
20/09/2026 Dallas $224 $273 -18% 218h
23/09/2026 San Francisco $81 $273 -70% 125h
25/09/2026 Las Vegas $140 $273 -49% 88h
26/09/2026 Fort Lauderdale $253 $273 -8% 53h
25/09/2026 Dallas $197 $268 -27% 94h

See full history →

Frequently asked questions

What is the usual price of a flight to Ontario?

The fare depends on the season and the departure airport. The median is calculated over 30 days. Any price below 50% of that threshold is flagged as a fare anomaly.

How many error fares to Ontario has Faro detected?

Faro has archived 872 error fare(s) to this destination. Each one is kept with its price, discount and duration in the Catch.

How can I be alerted to a cheap flight to Ontario?

Check this page regularly — deals are updated every 30 minutes. These fare anomalies only last a few hours on average.

See also : All cheap flights · Fare history → Ontario · Error fare guide