
$152 Cheap Frontier Airlines flights Ontario (ONT) to St. Louis (STL)
Prices were available within the past 7 days and start at $152 for one-way flights and $245 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Oct 21 - Sat, Oct 25
ONT
Ontario
STL
St. Louis
$245 Roundtrip, found 1 day ago
$245
Roundtrip
found 1 day ago

Fri, Sep 12 - Mon, Sep 15
ONT
Ontario
STL
St. Louis
$286 Roundtrip, found 1 hour ago
$286
Roundtrip
found 1 hour ago

Sun, Oct 19 - Tue, Oct 28
ONT
Ontario
STL
St. Louis
$288 Roundtrip, found 1 day ago
$288
Roundtrip
found 1 day ago

Tue, Oct 21 - Sat, Oct 25
ONT
Ontario
STL
St. Louis
$291 Roundtrip, found 1 day ago
$291
Roundtrip
found 1 day ago

Tue, Oct 21 - Sat, Oct 25
ONT
Ontario
STL
St. Louis
$291 Roundtrip, found 1 day ago
$291
Roundtrip
found 1 day ago

Sun, Oct 19 - Wed, Oct 22
ONT
Ontario
STL
St. Louis
$298 Roundtrip, found 1 day ago
$298
Roundtrip
found 1 day ago
Origin airport | Los Angeles - Ontario Intl. |
Destination airport | Lambert-St. Louis Intl. |
Airlines serving | Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, United |
Popular airline | Delta |
Distance | 2467 km |
Average flight time | 5 hours 40 mins |
Most Popular Frontier Airlines Routes from Ontario
- Frontier Airlines ONT to SEA
- Frontier Airlines ONT to STL
- Frontier Airlines ONT to BOI
- Frontier Airlines ONT to OMA
- Frontier Airlines ONT to LAS
- Frontier Airlines ONT to OKC
- Frontier Airlines ONT to MSP
- Frontier Airlines ONT to DSM
- Frontier Airlines ONT to DEN
- Frontier Airlines ONT to TUS
- Frontier Airlines ONT to MCO
Most Popular Frontier Airlines Routes from St. Louis
- Dallas to New York (DFW - JFK)
- New York to Atlanta (JFK - ATL)
- Atlanta to Las Vegas (ATL - LAS)
- Sacramento to San Antonio (SMF - SAT)
- Nashville to Seattle (BNA - SEA)
- Dallas to New York (DFW - LGA)
- Pittsburgh to Islip (PIT - ISP)
- Newark Liberty Intl. Airport to Miami (EWR - MIA)
- Tampa to Charlotte (TPA - CLT)
- Norfolk to Orlando (ORF - MCO)
Popular Domestic Routes in Lambert-St. Louis Intl.
- Orlando to Philadelphia (MCO - PHL)
- Newark Liberty Intl. Airport to Miami (EWR - MIA)
- Tampa to Charlotte (TPA - CLT)
- Nashville to Seattle (BNA - SEA)
- New York to Atlanta (JFK - ATL)
- Las Vegas to Reno (LAS - RNO)
- Orlando to Trenton (MCO - TTN)
- Portland to Ontario (PDX - ONT)
- Nashville to Seattle (BNA - SEA)
- Norfolk to Orlando (ORF - MCO)