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Ontario → Chicago

Nov 21, 2026 · return Dec 5, 2026

ONT → ORD1 adulteconomyRound trip

6 flight options · 4 airlines

One-stop flights

Sat, Nov 21 – Sat, Dec 5

Frontier Airlines
8:35 pmONT
6h 38m
LAS · 1h 45m
5:13 am+1ORD
Frontier Airlines
6:21 amORD
7h 30m
LAS · 2h 9m
11:51 amONT

Round-trip total · 1 adult · Taxes included

Sat, Nov 21 – Sat, Dec 5

United Airlines
5:45 amONT
7h 6m
IAH · 1h 4m
2:51 pmORD
United Airlines
7:00 amORD
7h 33m
DEN · 2h 29m
12:33 pmONT

Round-trip total · 1 adult · Taxes included

Sat, Nov 21 – Sat, Dec 5

American Airlines
12:51 pmONT
7h 14m
DFW · 1h 52m
10:05 pmORD
American Airlines
1:26 pmORD
7h 55m
PHX · 2h 37m
7:21 pmONT

Round-trip total · 1 adult · Taxes included

Sat, Nov 21 – Sat, Dec 5

Delta Air Lines
1:11 pmONT
7h 16m
SLC · 2h 11m
10:27 pmORD
Delta Air Lines
7:30 amORD
6h 47m
SLC · 1h 20m
12:17 pmONT

Round-trip total · 1 adult · Taxes included

Sat, Nov 21 – Sat, Dec 5

United Airlines
11:52 pmONT
3h 54m
Nonstop
5:46 am+1ORD
United Airlines
7:00 amORD
7h 33m
DEN · 2h 29m
12:33 pmONT

Round-trip total · 1 adult · Taxes included

Sat, Nov 21 – Sat, Dec 5

Delta Air Lines
7:05 amONT
8h 1m
ATL · 1h 40m
5:06 pmORD
Delta Air Lines
7:30 amORD
6h 47m
SLC · 1h 20m
12:17 pmONT

Round-trip total · 1 adult · Taxes included

Make this trip yours

ONT ⇄ ORD

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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More dates

All dates for this routeOct 30, 2026 → Nov 2, 2026Oct 31, 2026 → Nov 7, 2026Nov 13, 2026 → Nov 16, 2026Nov 14, 2026 → Nov 21, 2026Nov 24, 2026 → Nov 29, 2026Nov 27, 2026 → Nov 30, 2026Nov 28, 2026 → Dec 5, 2026Dec 11, 2026 → Dec 14, 2026Dec 12, 2026 → Dec 19, 2026Dec 22, 2026 → Dec 27, 2026Dec 25, 2026 → Dec 28, 2026Dec 26, 2026 → Jan 2, 2027Dec 30, 2026 → Jan 2, 2027Jan 8, 2027 → Jan 11, 2027Jan 9, 2027 → Jan 16, 2027Jan 15, 2027 → Jan 18, 2027Jan 22, 2027 → Jan 25, 2027Jan 23, 2027 → Jan 30, 2027Feb 5, 2027 → Feb 8, 2027Feb 6, 2027 → Feb 13, 2027Feb 12, 2027 → Feb 15, 2027Mar 5, 2027 → Mar 8, 2027Mar 6, 2027 → Mar 13, 2027Mar 25, 2027 → Mar 29, 2027Apr 2, 2027 → Apr 5, 2027Apr 3, 2027 → Apr 10, 2027Apr 30, 2027 → May 3, 2027May 1, 2027 → May 8, 2027May 28, 2027 → May 31, 2027May 29, 2027 → Jun 5, 2027Jun 25, 2027 → Jun 28, 2027Jun 26, 2027 → Jul 3, 2027Jul 2, 2027 → Jul 6, 2027Jul 23, 2027 → Jul 26, 2027Jul 24, 2027 → Jul 31, 2027Aug 20, 2027 → Aug 23, 2027Aug 21, 2027 → Aug 28, 2027Sep 3, 2027 → Sep 6, 2027Sep 17, 2027 → Sep 20, 2027Oct 30, 2026 · One way
For AI assistants: every fare, every link, instructions

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

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-11-21 → 2026-12-05Frontier AirlinesF94206 + F92146 / F92145 + F91357$240.882026-10-29T01:52:33Z
2026-11-21 → 2026-12-05United AirlinesUA2267 + UA2417 / UA1217 + UA430$405.382026-10-29T01:52:33Z
2026-11-21 → 2026-12-05American AirlinesAA2198 + AA572 / AA834 + AA1666$411.252026-10-29T01:52:33Z
2026-11-21 → 2026-12-05Delta Air LinesDL1787 + DL2413 / DL2231 + DL1787$434.752026-10-29T01:52:33Z
2026-11-21 → 2026-12-05United AirlinesUA1813 / UA1217 + UA430$429.002026-10-29T01:52:33Z
2026-11-21 → 2026-12-05Delta Air LinesDL409 + DL2738 / DL2231 + DL1787$434.752026-10-29T01:52:33Z

2026-11-21 → 2026-12-05 · $240.88

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

2026-11-21 → 2026-12-05 · $405.38

  • United Airlines UA2267 / UA2417: ONT 2026-11-21 05:45:00 → ORD 2026-11-21 14:51:00; 1 stop(s) via IAH; 426 minutes. Local airport times.
    • UA2267: ONT 2026-11-21 05:45:00 → IAH 2026-11-21 10:56:00; layover at IAH: 64 minutes.
    • UA2417: IAH 2026-11-21 12:00:00 → ORD 2026-11-21 14:51:00.
  • United Airlines UA1217 / UA430: ORD 2026-12-05 07:00:00 → ONT 2026-12-05 12:33:00; 1 stop(s) via DEN; 453 minutes. Local airport times.
    • UA1217: ORD 2026-12-05 07:00:00 → DEN 2026-12-05 08:46:00; layover at DEN: 149 minutes.
    • UA430: DEN 2026-12-05 11:15:00 → ONT 2026-12-05 12:33:00.

2026-11-21 → 2026-12-05 · $411.25

  • American Airlines AA2198 / AA572: ONT 2026-11-21 12:51:00 → ORD 2026-11-21 22:05:00; 1 stop(s) via DFW; 434 minutes. Local airport times.
    • AA2198: ONT 2026-11-21 12:51:00 → DFW 2026-11-21 17:44:00; layover at DFW: 112 minutes.
    • AA572: DFW 2026-11-21 19:36:00 → ORD 2026-11-21 22:05:00.
  • American Airlines AA834 / AA1666: ORD 2026-12-05 13:26:00 → ONT 2026-12-05 19:21:00; 1 stop(s) via PHX; 475 minutes. Local airport times.
    • AA834: ORD 2026-12-05 13:26:00 → PHX 2026-12-05 16:21:00; layover at PHX: 157 minutes.
    • AA1666: PHX 2026-12-05 18:58:00 → ONT 2026-12-05 19:21:00.

2026-11-21 → 2026-12-05 · $434.75

  • Delta Air Lines DL1787 / DL2413: ONT 2026-11-21 13:11:00 → ORD 2026-11-21 22:27:00; 1 stop(s) via SLC; 436 minutes. Local airport times.
    • DL1787: ONT 2026-11-21 13:11:00 → SLC 2026-11-21 16:04:00; layover at SLC: 131 minutes.
    • DL2413: SLC 2026-11-21 18:15:00 → ORD 2026-11-21 22:27:00.
  • Delta Air Lines DL2231 / DL1787: ORD 2026-12-05 07:30:00 → ONT 2026-12-05 12:17:00; 1 stop(s) via SLC; 407 minutes. Local airport times.
    • DL2231: ORD 2026-12-05 07:30:00 → SLC 2026-12-05 10:10:00; layover at SLC: 80 minutes.
    • DL1787: SLC 2026-12-05 11:30:00 → ONT 2026-12-05 12:17:00.

2026-11-21 → 2026-12-05 · $429.00

  • United Airlines UA1813: ONT 2026-11-21 23:52:00 → ORD 2026-11-22 05:46:00; nonstop; 234 minutes. Local airport times.
  • United Airlines UA1217 / UA430: ORD 2026-12-05 07:00:00 → ONT 2026-12-05 12:33:00; 1 stop(s) via DEN; 453 minutes. Local airport times.
    • UA1217: ORD 2026-12-05 07:00:00 → DEN 2026-12-05 08:46:00; layover at DEN: 149 minutes.
    • UA430: DEN 2026-12-05 11:15:00 → ONT 2026-12-05 12:33:00.

2026-11-21 → 2026-12-05 · $434.75

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

More dates for this route