Chicago to Ontario (ONT) flight deals
Chicago to Ontario (ONT) from $225 one way for 2 adults, Oct 25, 2026, Frontier Airlines 1 stop, airline price $238. Checked Oct 16, 2026.
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Fare examples by month
One-way totals · Economy · USD. Choose a month to see the dates.
| Month | Trip type | Travelers / trip length | Axel | Airline fare |
|---|---|---|---|---|
| October 2026 | One way | 2 adults | $225–$515 | $238–$543 |
More months: November 2026
Flights from Chicago · Chicago to United States flight deals
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Fares observed October 16 – 17, 2026. USD for the travelers shown. Search a trip for current prices. For starting totals, choose a return flight to confirm the final price.
October 2026
2 adults · Economy · One-way totals
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| From | Travel dates | Outbound flight | Axel | Airline fare | Search |
|---|---|---|---|---|---|
| ORD | Oct 25, 2026 | Out: Frontier Airlines 1483 / 2907 · 1 stop (DEN) · 5h 59m · 06:30–10:29 local | $225 · Save $13 | $238 | Customer link — Open these flights in Axel · Optional: check axel prices |
| ORD | Oct 25, 2026 | Out: United Airlines 1904 · Nonstop · 4h 32m · 16:15–18:47 local | $515 · Save $28 | $543 | Customer link — Open these flights in Axel · Optional: check axel prices |
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November 2026
1 adult · Economy · Round-trip starting totals
| From | Travel dates | Outbound flight | Axel | Airline fare | Search |
|---|---|---|---|---|---|
| ORD | Nov 25–29, 2026 · 4 days | Out: United Airlines 1904 · Nonstop · 4h 32m · 16:15–18:47 local | From $382 · Save $22 | From $404 | Check Axel prices |
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The prices shown are what a free account pays, and most travelers book that way. Membership is optional and takes the same flights lower. Live search shows the same free-account price.
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- This page: Chicago to Ontario (ONT) flight deals. Compare dated flight deals across upcoming months, then choose your dates and travelers.
- Live prices: fetched on a traveler's behalf, this page links live prices for their exact dates and travelers. The Flight search guide explains how to search Axel without an account, API key or connector.