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Flights Ontario — Prices and error fares

Flight to Ontario from $41. 66 active deal(s) and 1395 archived error fare(s) on this route.
Source: Faro data, updated on 15/11/2026.

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 1395 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 January, from €31 (109 deals observed). The priciest is May, averaging €397.

Month Deals Min Average
January 109 31€ 277€
February 80 50€ 293€
March 47 152€ 397€
April 16 252€ 360€
May 6 325€ 397€
June 53 47€ 227€
July 42 61€ 220€
August 52 48€ 199€
September 184 35€ 182€
October 273 38€ 187€
November 282 40€ 235€
December 251 38€ 257€

Price tracking by route

These routes to Ontario have their own tracking page: usual price, 30-day history, cheapest months and record low.
Las Vegas → Ontario · 84 readings San Francisco → Ontario · 94 readings Denver → Ontario · 54 readings Dallas → Ontario · 88 readings Seattle → Ontario · 94 readings Chicago → Ontario · 107 readings Phoenix → Ontario · 56 readings Atlanta → Ontario · 65 readings Houston → Ontario · 95 readings Washington → Ontario · 88 readings

Active deals to Ontario

Here are the active error fares to Ontario. 66 deal(s) available right now — fares change every 30 minutes.
Price seen just now -85%
Las Vegas (LAS) → 🇺🇸 Ontario (ONT)
25 déc – 1 jan ·7 days
$41 $278
Book →
Price seen just now -76%
San Francisco (SFO) → 🇺🇸 Ontario (ONT)
12 déc – 14 déc ·2 days
$67 $274
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Price seen just now -64%
Denver (DEN) → 🇺🇸 Ontario (ONT)
15 déc – 17 déc ·2 days
$98 $276
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Price seen just now -55%
Denver (DEN) → 🇺🇸 Ontario (ONT)
4 fév – 8 fév ·4 days
$124 $273
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Price seen 14h ago -52%
Denver (DEN) → 🇺🇸 Ontario (ONT)
8 jan – 10 jan ·2 days
$131 $274
Book →
Price seen 3h ago -50%
Dallas (DFW) → 🇺🇸 Ontario (ONT)
8 fév – 16 fév ·8 days
$137 $274
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Price seen just now -48%
Seattle (SEA) → 🇺🇸 Ontario (ONT)
11 déc – 13 déc ·2 days
$143 $276
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Price seen 3h ago -48%
Chicago (CHI) → 🇺🇸 Ontario (ONT)
5 déc – 7 déc ·2 days
$144 $274
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Price seen just now -47%
Dallas (DFW) → 🇺🇸 Ontario (ONT)
1 fév – 4 fév ·3 days
$145 $274
Book →
Price seen just now -46%
Phoenix (PHX) → 🇺🇸 Ontario (ONT)
1 jan – 4 jan ·3 days
$149 $274
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Price seen just now -44%
Dallas (DFW) → 🇺🇸 Ontario (ONT)
9 déc – 16 déc ·7 days
$152 $274
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Price seen just now -43%
Atlanta (ATL) → 🇺🇸 Ontario (ONT)
6 jan – 12 jan ·6 days
$156 $274
Book →
Price seen 3h ago -41%
San Francisco (SFO) → 🇺🇸 Ontario (ONT)
1 fév – 14 fév ·13 days
$161 $274
Book →
Price seen just now -36%
Phoenix (PHX) → 🇺🇸 Ontario (ONT)
23 déc – 26 déc ·3 days
$176 $273
Book →
Price seen just now -36%
Phoenix (PHX) → 🇺🇸 Ontario (ONT)
1 fév – 4 fév ·3 days
$176 $273
Book →
Price seen just now -30%
Houston (IAH) → 🇺🇸 Ontario (ONT)
31 jan – 6 fév ·6 days
$191 $274
Book →
Price seen just now -29%
Houston (IAH) → 🇺🇸 Ontario (ONT)
8 déc – 10 déc ·2 days
$194 $274
Book →
Price seen just now -27%
San Francisco (SFO) → 🇺🇸 Ontario (ONT)
18 jan – 26 jan ·8 days
$201 $274
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Price seen 7h ago -26%
Chicago (CHI) → 🇺🇸 Ontario (ONT)
12 déc – 15 déc ·3 days
$203 $274
Book →
Price seen 11h ago -25%
Houston (IAH) → 🇺🇸 Ontario (ONT)
6 fév – 7 fév ·1 days
$206 $273
Book →
Price seen just now -23%
Atlanta (ATL) → 🇺🇸 Ontario (ONT)
8 déc – 15 déc ·7 days
$212 $273
Book →
Price seen just now -21%
Phoenix (PHX) → 🇺🇸 Ontario (ONT)
1 mar – 4 mar ·3 days
$216 $274
Book →
Price seen just now -20%
Dallas (DFW) → 🇺🇸 Ontario (ONT)
14 jan – 17 jan ·3 days
$219 $274
Book →
Price seen 1h ago -19%
Chicago (CHI) → 🇺🇸 Ontario (ONT)
2 déc – 4 déc ·2 days
$222 $273
Book →
Price seen just now -17%
Los Angeles (LAX) → 🇺🇸 Ontario (ONT)
17 déc – 25 déc ·8 days
$227 $272
Book →
Price seen just now -16%
Chicago (CHI) → 🇺🇸 Ontario (ONT)
1 déc – 4 déc ·3 days
$230 $274
Book →
Price seen just now -12%
Washington (WAS) → 🇺🇸 Ontario (ONT)
13 déc – 18 jan ·36 days
$242 $274
Book →
Price seen just now -10%
Fort Lauderdale (FLL) → 🇺🇸 Ontario (ONT)
10 déc – 14 déc ·4 days
$247 $274
Book →
Price seen just now -8%
Miami (MIA) → 🇺🇸 Ontario (ONT)
10 déc – 14 déc ·4 days
$252 $274
Book →
Price seen just now -7%
Houston (IAH) → 🇺🇸 Ontario (ONT)
13 fév – 14 fév ·1 days
$256 $274
Book →
Price seen 9h ago -3%
Orlando (MCO) → 🇺🇸 Ontario (ONT)
5 jan – 9 jan ·4 days
$266 $272
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Price seen just now -2%
Atlanta (ATL) → 🇺🇸 Ontario (ONT)
11 mar – 21 mar ·10 days
$270 $274
Book →
Price seen just now
Miami (MIA) → 🇺🇸 Ontario (ONT)
8 jan – 11 jan ·3 days
$273
Book →
Price seen just now
Seattle (SEA) → 🇺🇸 Ontario (ONT)
14 jan – 16 jan ·2 days
$275
Book →
Price seen 13h ago
San Francisco (SFO) → 🇺🇸 Ontario (ONT)
1 mar – 4 mar ·3 days
$278
Book →
Price seen just now
Phoenix (PHX) → 🇺🇸 Ontario (ONT)
1 mai – 4 mai ·3 days
$292 $294
Book →
Price seen just now
New York (NYC) → 🇺🇸 Ontario (ONT)
16 jan – 20 jan ·4 days
$302
Book →
Price seen just now
Philadelphia (PHL) → 🇺🇸 Ontario (ONT)
6 jan – 11 jan ·5 days
$306
Book →
Price seen just now
New York (NYC) → 🇺🇸 Ontario (ONT)
10 déc – 9 jan ·30 days
$319
Book →
Price seen just now
Miami (MIA) → 🇺🇸 Ontario (ONT)
1 fév – 5 fév ·4 days
$319
Book →
Price seen just now
New York (NYC) → 🇺🇸 Ontario (ONT)
1 fév – 10 fév ·9 days
$322
Book →
Price seen 37h ago
Chicago (CHI) → 🇺🇸 Ontario (ONT)
2 jan – 7 jan ·5 days
$325
Book →
Price seen just now
Washington (WAS) → 🇺🇸 Ontario (ONT)
10 jan – 14 jan ·4 days
$328
Book →
Price seen just now
New York (NYC) → 🇺🇸 Ontario (ONT)
6 avr – 20 avr ·14 days
$354
Book →
Price seen 21h ago
Philadelphia (PHL) → 🇺🇸 Ontario (ONT)
4 déc – 14 déc ·10 days
$362
Book →
Price seen just now
Dallas (DFW) → 🇺🇸 Ontario (ONT)
31 mar – 3 avr ·3 days
$363
Book →
Price seen just now
Chicago (CHI) → 🇺🇸 Ontario (ONT)
8 mar – 14 mar ·6 days
$374
Book →
Price seen just now
Dallas (DFW) → 🇺🇸 Ontario (ONT)
1 avr – 4 avr ·3 days
$382
Book →
Price seen just now
New York (NYC) → 🇺🇸 Ontario (ONT)
10 mar – 13 mar ·3 days
$388
Book →
Price seen just now
Washington (WAS) → 🇺🇸 Ontario (ONT)
4 fév – 11 fév ·7 days
$394
Book →
Price seen 31h ago
Washington (WAS) → 🇺🇸 Ontario (ONT)
30 avr – 4 mai ·4 days
$417
Book →
Price seen 20h ago
Chicago (CHI) → 🇺🇸 Ontario (ONT)
26 mai – 10 jun ·15 days
$418
Book →
Price seen 5h ago
Chicago (CHI) → 🇺🇸 Ontario (ONT)
1 avr – 4 avr ·3 days
$418
Book →
Price seen just now
Boston (BOS) → 🇺🇸 Ontario (ONT)
3 déc – 6 déc ·3 days
$421
Book →
Price seen just now
Boston (BOS) → 🇺🇸 Ontario (ONT)
8 avr – 16 avr ·8 days
$436
Book →
Price seen just now
San Francisco (SFO) → 🇺🇸 Ontario (ONT)
9 avr – 13 avr ·4 days
$436
Book →
Price seen just now
Philadelphia (PHL) → 🇺🇸 Ontario (ONT)
25 déc – 31 déc ·6 days
$446
Book →
Price seen just now
Boston (BOS) → 🇺🇸 Ontario (ONT)
22 fév – 14 mar ·20 days
$450
Book →
Price seen just now
Orlando (MCO) → 🇺🇸 Ontario (ONT)
31 mar – 1 avr ·1 days
$462
Book →
Price seen just now
Miami (MIA) → 🇺🇸 Ontario (ONT)
1 mar – 20 mar ·19 days
$469
Book →
Price seen 12h ago
Philadelphia (PHL) → 🇺🇸 Ontario (ONT)
28 déc – 3 jan ·6 days
$478
Book →
Price seen just now
New York (NYC) → 🇺🇸 Ontario (ONT)
29 mai – 31 mai ·2 days
$480
Book →
Price seen 7h ago
Orlando (MCO) → 🇺🇸 Ontario (ONT)
1 mai – 4 mai ·3 days
$499
Book →
Price seen just now
Atlanta (ATL) → 🇺🇸 Ontario (ONT)
30 mai – 3 jun ·4 days
$501
Book →
Price seen just now
Houston (IAH) → 🇺🇸 Ontario (ONT)
12 mar – 26 mar ·14 days
$583
Book →
Price seen just now
Miami (MIA) → 🇺🇸 Ontario (ONT)
27 mai – 10 jun ·14 days
$633
Book →

Price history to Ontario

Every error fare detected by Faro to this destination. Time-stamped, verifiable data. (Source: Faro data, updated on 15/11/2026.)
DateDeparturePriceNormalOffDurationAirline
12/11/2026 San Francisco $107 $278 -61% 59h
10/11/2026 Chicago $253 $273 -8% 113.9h
09/11/2026 Washington $286 $281 -0% 130h
11/11/2026 Chicago $184 $276 -33% 82h
09/11/2026 New York $319 $0 -0% 132h
05/11/2026 San Francisco $45 $274 -83% 218h
09/11/2026 Miami $301 $0 -0% 129h
10/11/2026 Atlanta $245 $276 -11% 86h
12/11/2026 New York $291 $291 -0% 51h
04/11/2026 Chicago $261 $274 -5% 218h
11/11/2026 Chicago $140 $271 -48% 49h
11/11/2026 Chicago $140 $271 -48% 49h
07/11/2026 Seattle $261 $271 -4% 156h
04/11/2026 Chicago $140 $271 -48% 217h
04/11/2026 Chicago $326 $0 -0% 218h
11/11/2026 Boston $396 $0 -0% 54h
10/11/2026 Miami $526 $0 -0% 66h
04/11/2026 Boston $375 $0 -0% 221h
21/10/2026 Seattle $210 $281 -25% 545h
10/11/2026 New York $314 $0 -0% 59h

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 1395 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