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Ontario → Chicago

Jun 25, 2027 · return Jun 28, 2027

ONT → ORD1 adulteconomyRound trip

8 flight options · 4 airlines

Nonstop flights

Fri, Jun 25 – Mon, Jun 28

United Airlines
7:00 amONT
4h 4m
Nonstop
1:04 pmORD
United Airlines
4:15 pmORD
4h 32m
Nonstop
6:47 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Jun 25 – Mon, Jun 28

United Airlines
11:52 pmONT
3h 54m
Nonstop
5:46 am+1ORD
United Airlines
4:15 pmORD
4h 32m
Nonstop
6:47 pmONT

Round-trip total · 1 adult · Taxes included

One-stop flights

Fri, Jun 25 – Mon, Jun 28

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

Fri, Jun 25 – Mon, Jun 28

American Airlines
12:51 pmONT
7h 14m
DFW · 1h 52m
10:05 pmORD
American Airlines
6:59 amORD
8h 25m
DFW · 2h 18m
1:24 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Jun 25 – Mon, Jun 28

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

Fri, Jun 25 – Mon, Jun 28

United Airlines
7:00 amONT
4h
Nonstop
1:00 pmORD
United Airlines
7:00 amORD
7h 33m
DEN · 2h 29m
12:33 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Jun 25 – Mon, Jun 28

United Airlines
5:45 amONT
7h 6m
IAH · 1h 4m
2:51 pmORD
United Airlines
4:15 pmORD
4h 32m
Nonstop
6:47 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Jun 25 – Mon, Jun 28

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 routeNov 5, 2026 → Nov 8, 2026Nov 14, 2026 → Nov 21, 2026Nov 24, 2026 → Nov 29, 2026Dec 5, 2026 → Dec 12, 2026Dec 17, 2026 → Dec 20, 2026Dec 26, 2026 → Jan 2, 2027Jan 5, 2027 · One wayJan 16, 2027 → Jan 23, 2027Feb 5, 2027 → Feb 8, 2027Apr 3, 2027 → Apr 10, 2027Jun 26, 2027 → Jul 3, 2027Sep 17, 2027 → Sep 20, 2027
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)
2027-06-25 → 2027-06-28United AirlinesUA2226 / UA1904$450.002026-10-29T01:52:33Z
2027-06-25 → 2027-06-28Frontier AirlinesF94206 + F92146 / F92145 + F91357$250.002026-10-29T01:52:33Z
2027-06-25 → 2027-06-28American AirlinesAA2198 + AA572 / AA2421 + AA2635$410.002026-10-29T01:52:33Z
2027-06-25 → 2027-06-28Delta Air LinesDL1787 + DL2413 / DL2231 + DL1787$430.002026-10-29T01:52:33Z
2027-06-25 → 2027-06-28United AirlinesUA1813 / UA1904$450.002026-10-29T01:52:33Z
2027-06-25 → 2027-06-28United AirlinesUA2226 / UA1217 + UA430$425.002026-10-29T01:52:33Z
2027-06-25 → 2027-06-28United AirlinesUA2267 + UA2417 / UA1904$425.002026-10-29T01:52:33Z
2027-06-25 → 2027-06-28Delta Air LinesDL409 + DL2738 / DL2231 + DL1787$430.002026-10-29T01:52:33Z

2027-06-25 → 2027-06-28 · $450.00

  • United Airlines UA2226: ONT 2027-06-25 07:00:00 → ORD 2027-06-25 13:04:00; nonstop; 244 minutes. Local airport times.
  • United Airlines UA1904: ORD 2027-06-28 16:15:00 → ONT 2027-06-28 18:47:00; nonstop; 272 minutes. Local airport times.

2027-06-25 → 2027-06-28 · $250.00

  • Frontier Airlines F94206 / F92146: ONT 2027-06-25 20:35:00 → ORD 2027-06-26 05:13:00; 1 stop(s) via LAS; 398 minutes. Local airport times.
    • F94206: ONT 2027-06-25 20:35:00 → LAS 2027-06-25 21:44:00; layover at LAS: 105 minutes.
    • F92146: LAS 2027-06-25 23:29:00 → ORD 2027-06-26 05:13:00.
  • Frontier Airlines F92145 / F91357: ORD 2027-06-28 06:21:00 → ONT 2027-06-28 11:51:00; 1 stop(s) via LAS; 450 minutes. Local airport times.
    • F92145: ORD 2027-06-28 06:21:00 → LAS 2027-06-28 08:36:00; layover at LAS: 129 minutes.
    • F91357: LAS 2027-06-28 10:45:00 → ONT 2027-06-28 11:51:00.

2027-06-25 → 2027-06-28 · $410.00

  • American Airlines AA2198 / AA572: ONT 2027-06-25 12:51:00 → ORD 2027-06-25 22:05:00; 1 stop(s) via DFW; 434 minutes. Local airport times.
    • AA2198: ONT 2027-06-25 12:51:00 → DFW 2027-06-25 17:44:00; layover at DFW: 112 minutes.
    • AA572: DFW 2027-06-25 19:36:00 → ORD 2027-06-25 22:05:00.
  • American Airlines AA2421 / AA2635: ORD 2027-06-28 06:59:00 → ONT 2027-06-28 13:24:00; 1 stop(s) via DFW; 505 minutes. Local airport times.
    • AA2421: ORD 2027-06-28 06:59:00 → DFW 2027-06-28 09:50:00; layover at DFW: 138 minutes.
    • AA2635: DFW 2027-06-28 12:08:00 → ONT 2027-06-28 13:24:00.

2027-06-25 → 2027-06-28 · $430.00

  • Delta Air Lines DL1787 / DL2413: ONT 2027-06-25 13:11:00 → ORD 2027-06-25 22:27:00; 1 stop(s) via SLC; 436 minutes. Local airport times.
    • DL1787: ONT 2027-06-25 13:11:00 → SLC 2027-06-25 16:04:00; layover at SLC: 131 minutes.
    • DL2413: SLC 2027-06-25 18:15:00 → ORD 2027-06-25 22:27:00.
  • Delta Air Lines DL2231 / DL1787: ORD 2027-06-28 07:30:00 → ONT 2027-06-28 12:17:00; 1 stop(s) via SLC; 407 minutes. Local airport times.
    • DL2231: ORD 2027-06-28 07:30:00 → SLC 2027-06-28 10:10:00; layover at SLC: 80 minutes.
    • DL1787: SLC 2027-06-28 11:30:00 → ONT 2027-06-28 12:17:00.

2027-06-25 → 2027-06-28 · $450.00

  • United Airlines UA1813: ONT 2027-06-25 23:52:00 → ORD 2027-06-26 05:46:00; nonstop; 234 minutes. Local airport times.
  • United Airlines UA1904: ORD 2027-06-28 16:15:00 → ONT 2027-06-28 18:47:00; nonstop; 272 minutes. Local airport times.

2027-06-25 → 2027-06-28 · $425.00

  • United Airlines UA2226: ONT 2027-06-25 07:00:00 → ORD 2027-06-25 13:00:00; nonstop; 240 minutes. Local airport times.
  • United Airlines UA1217 / UA430: ORD 2027-06-28 07:00:00 → ONT 2027-06-28 12:33:00; 1 stop(s) via DEN; 453 minutes. Local airport times.
    • UA1217: ORD 2027-06-28 07:00:00 → DEN 2027-06-28 08:46:00; layover at DEN: 149 minutes.
    • UA430: DEN 2027-06-28 11:15:00 → ONT 2027-06-28 12:33:00.

2027-06-25 → 2027-06-28 · $425.00

  • United Airlines UA2267 / UA2417: ONT 2027-06-25 05:45:00 → ORD 2027-06-25 14:51:00; 1 stop(s) via IAH; 426 minutes. Local airport times.
    • UA2267: ONT 2027-06-25 05:45:00 → IAH 2027-06-25 10:56:00; layover at IAH: 64 minutes.
    • UA2417: IAH 2027-06-25 12:00:00 → ORD 2027-06-25 14:51:00.
  • United Airlines UA1904: ORD 2027-06-28 16:15:00 → ONT 2027-06-28 18:47:00; nonstop; 272 minutes. Local airport times.

2027-06-25 → 2027-06-28 · $430.00

  • Delta Air Lines DL409 / DL2738: ONT 2027-06-25 07:05:00 → ORD 2027-06-25 17:06:00; 1 stop(s) via ATL; 481 minutes. Local airport times.
    • DL409: ONT 2027-06-25 07:05:00 → ATL 2027-06-25 14:10:00; layover at ATL: 100 minutes.
    • DL2738: ATL 2027-06-25 15:50:00 → ORD 2027-06-25 17:06:00.
  • Delta Air Lines DL2231 / DL1787: ORD 2027-06-28 07:30:00 → ONT 2027-06-28 12:17:00; 1 stop(s) via SLC; 407 minutes. Local airport times.
    • DL2231: ORD 2027-06-28 07:30:00 → SLC 2027-06-28 10:10:00; layover at SLC: 80 minutes.
    • DL1787: SLC 2027-06-28 11:30:00 → ONT 2027-06-28 12:17:00.

More dates for this route