Chicago (ORD) to Ontario (ONT) · Dec 15, 2026 · return Dec 21, 2026

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

2026-12-15 → 2026-12-21 · Axel-exclusive $486.00

• United Airlines UA1904: ORD 2026-12-15 16:15:00 → ONT 2026-12-15 18:47:00; nonstop; 272 minutes. Local airport times.
• United Airlines UA2226: ONT 2026-12-21 07:00:00 → ORD 2026-12-21 13:00:00; nonstop; 240 minutes. Local airport times.

2026-12-15 → 2026-12-21 · Axel-exclusive $258.00

• Frontier Airlines F92145 / F91357: ORD 2026-12-15 06:21:00 → ONT 2026-12-15 11:51:00; 1 stop(s) via LAS; 450 minutes. Local airport times.
  • F92145: ORD 2026-12-15 06:21:00 → LAS 2026-12-15 08:36:00; layover at LAS: 129 minutes.
  • F91357: LAS 2026-12-15 10:45:00 → ONT 2026-12-15 11:51:00.
• Frontier Airlines F94206 / F92146: ONT 2026-12-21 20:35:00 → ORD 2026-12-22 05:13:00; 1 stop(s) via LAS; 398 minutes. Local airport times.
  • F94206: ONT 2026-12-21 20:35:00 → LAS 2026-12-21 21:44:00; layover at LAS: 105 minutes.
  • F92146: LAS 2026-12-21 23:29:00 → ORD 2026-12-22 05:13:00.

2026-12-15 → 2026-12-21 · Axel-exclusive $420.00

• American Airlines AA834 / AA1666: ORD 2026-12-15 13:26:00 → ONT 2026-12-15 19:21:00; 1 stop(s) via PHX; 475 minutes. Local airport times.
  • AA834: ORD 2026-12-15 13:26:00 → PHX 2026-12-15 16:21:00; layover at PHX: 157 minutes.
  • AA1666: PHX 2026-12-15 18:58:00 → ONT 2026-12-15 19:21:00.
• American Airlines AA2198 / AA572: ONT 2026-12-21 12:51:00 → ORD 2026-12-21 22:05:00; 1 stop(s) via DFW; 434 minutes. Local airport times.
  • AA2198: ONT 2026-12-21 12:51:00 → DFW 2026-12-21 17:44:00; layover at DFW: 112 minutes.
  • AA572: DFW 2026-12-21 19:36:00 → ORD 2026-12-21 22:05:00.

2026-12-15 → 2026-12-21 · Axel-exclusive $444.00

• Delta Air Lines DL2231 / DL1787: ORD 2026-12-15 07:30:00 → ONT 2026-12-15 12:17:00; 1 stop(s) via SLC; 407 minutes. Local airport times.
  • DL2231: ORD 2026-12-15 07:30:00 → SLC 2026-12-15 10:10:00; layover at SLC: 80 minutes.
  • DL1787: SLC 2026-12-15 11:30:00 → ONT 2026-12-15 12:17:00.
• Delta Air Lines DL409 / DL2738: ONT 2026-12-21 07:05:00 → ORD 2026-12-21 17:06:00; 1 stop(s) via ATL; 481 minutes. Local airport times.
  • DL409: ONT 2026-12-21 07:05:00 → ATL 2026-12-21 14:10:00; layover at ATL: 100 minutes.
  • DL2738: ATL 2026-12-21 15:50:00 → ORD 2026-12-21 17:06:00.

2026-12-15 → 2026-12-21 · Axel-exclusive $420.00

• American Airlines AA2421 / AA2635: ORD 2026-12-15 06:59:00 → ONT 2026-12-15 13:24:00; 1 stop(s) via DFW; 505 minutes. Local airport times.
  • AA2421: ORD 2026-12-15 06:59:00 → DFW 2026-12-15 09:50:00; layover at DFW: 138 minutes.
  • AA2635: DFW 2026-12-15 12:08:00 → ONT 2026-12-15 13:24:00.
• American Airlines AA2198 / AA572: ONT 2026-12-21 12:51:00 → ORD 2026-12-21 22:05:00; 1 stop(s) via DFW; 434 minutes. Local airport times.
  • AA2198: ONT 2026-12-21 12:51:00 → DFW 2026-12-21 17:44:00; layover at DFW: 112 minutes.
  • AA572: DFW 2026-12-21 19:36:00 → ORD 2026-12-21 22:05:00.

2026-12-15 → 2026-12-21 · Axel-exclusive $420.00

• American Airlines AA1211 / AS489: ORD 2026-12-15 17:25:00 → ONT 2026-12-15 23:59:00; 1 stop(s) via SEA; 514 minutes. Local airport times.
  • AA1211: ORD 2026-12-15 17:25:00 → SEA 2026-12-15 20:20:00; layover at SEA: 63 minutes.
  • AS489: SEA 2026-12-15 21:23:00 → ONT 2026-12-15 23:59:00.
• American Airlines AA2198 / AA572: ONT 2026-12-21 12:51:00 → ORD 2026-12-21 22:05:00; 1 stop(s) via DFW; 434 minutes. Local airport times.
  • AA2198: ONT 2026-12-21 12:51:00 → DFW 2026-12-21 17:44:00; layover at DFW: 112 minutes.
  • AA572: DFW 2026-12-21 19:36:00 → ORD 2026-12-21 22:05:00.

2026-12-15 → 2026-12-21 · Axel-exclusive $458.50

• United Airlines UA1217 / UA430: ORD 2026-12-15 07:00:00 → ONT 2026-12-15 12:33:00; 1 stop(s) via DEN; 453 minutes. Local airport times.
  • UA1217: ORD 2026-12-15 07:00:00 → DEN 2026-12-15 08:46:00; layover at DEN: 149 minutes.
  • UA430: DEN 2026-12-15 11:15:00 → ONT 2026-12-15 12:33:00.
• United Airlines UA2226: ONT 2026-12-21 07:00:00 → ORD 2026-12-21 13:00:00; nonstop; 240 minutes. Local airport times.

Explore this route

• All dates for this route
• Dec 14, 2026 · Return options
• Dec 16, 2026 · Return options

For AI assistants

• This page: Chicago (ORD) to Ontario (ONT) · Dec 15, 2026 · return Dec 21, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
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