Chicago (ORD) to Ontario (ONT) · Dec 23, 2026 · one way

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Route overview: Chicago to Ontario (ONT) flight deals

2026-12-23 · one way · Axel-exclusive $301.00

• United Airlines UA1904: ORD 2026-12-23 16:15:00 → ONT 2026-12-23 18:47:00; nonstop; 272 minutes. Local airport times.

2026-12-23 · one way · Axel-exclusive $161.00

• Frontier Airlines F92145 / F91357: ORD 2026-12-23 06:21:00 → ONT 2026-12-23 11:51:00; 1 stop(s) via LAS; 450 minutes. Local airport times.
  • F92145: ORD 2026-12-23 06:21:00 → LAS 2026-12-23 08:36:00; layover at LAS: 129 minutes.
  • F91357: LAS 2026-12-23 10:45:00 → ONT 2026-12-23 11:51:00.

2026-12-23 · one way · Axel-exclusive $259.00

• American Airlines AA834 / AA1666: ORD 2026-12-23 13:26:00 → ONT 2026-12-23 19:21:00; 1 stop(s) via PHX; 475 minutes. Local airport times.
  • AA834: ORD 2026-12-23 13:26:00 → PHX 2026-12-23 16:21:00; layover at PHX: 157 minutes.
  • AA1666: PHX 2026-12-23 18:58:00 → ONT 2026-12-23 19:21:00.

2026-12-23 · one way · Axel-exclusive $273.00

• Delta Air Lines DL2231 / DL1787: ORD 2026-12-23 07:30:00 → ONT 2026-12-23 12:17:00; 1 stop(s) via SLC; 407 minutes. Local airport times.
  • DL2231: ORD 2026-12-23 07:30:00 → SLC 2026-12-23 10:10:00; layover at SLC: 80 minutes.
  • DL1787: SLC 2026-12-23 11:30:00 → ONT 2026-12-23 12:17:00.

2026-12-23 · one way · Axel-exclusive $259.00

• United Airlines UA1217 / UA430: ORD 2026-12-23 07:00:00 → ONT 2026-12-23 12:33:00; 1 stop(s) via DEN; 453 minutes. Local airport times.
  • UA1217: ORD 2026-12-23 07:00:00 → DEN 2026-12-23 08:46:00; layover at DEN: 149 minutes.
  • UA430: DEN 2026-12-23 11:15:00 → ONT 2026-12-23 12:33:00.

2026-12-23 · one way · Axel-exclusive $259.00

• American Airlines AA2421 / AA2635: ORD 2026-12-23 06:59:00 → ONT 2026-12-23 13:24:00; 1 stop(s) via DFW; 505 minutes. Local airport times.
  • AA2421: ORD 2026-12-23 06:59:00 → DFW 2026-12-23 09:50:00; layover at DFW: 138 minutes.
  • AA2635: DFW 2026-12-23 12:08:00 → ONT 2026-12-23 13:24:00.

2026-12-23 · one way · Axel-exclusive $259.00

• American Airlines AA1211 / AS489: ORD 2026-12-23 17:25:00 → ONT 2026-12-23 23:59:00; 1 stop(s) via SEA; 514 minutes. Local airport times.
  • AA1211: ORD 2026-12-23 17:25:00 → SEA 2026-12-23 20:20:00; layover at SEA: 63 minutes.
  • AS489: SEA 2026-12-23 21:23:00 → ONT 2026-12-23 23:59:00.

Explore this route

• All dates for this route
• Dec 22, 2026 · Return options
• Dec 24, 2026 · Return options

For AI assistants

• This page: Chicago (ORD) to Ontario (ONT) · Dec 23, 2026 · one way: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
• Next: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
• Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
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• Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.

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