Chicago (MDW) to Ontario (ONT) flights
One airline flies nonstop from Chicago (MDW) to Ontario (ONT): Southwest Airlines. The two airports are 1,703 miles (2,741 km) apart. There are also 21 ways to fly it with one stop, through Denver, Las Vegas and Phoenix and more.
Airlines flying nonstop from MDW to ONT
- Southwest AirlinesNot in an allianceWho books it
MDW to ONT with one stop
21 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Denver (DEN)Southwest Airlines the whole way
- Via Las Vegas (LAS)Southwest Airlines the whole way
- Via Phoenix (PHX)Southwest Airlines the whole way
- Via Salt Lake City (SLC)Southwest Airlines, then Delta Air Lines
- Via Dallas (DFW)Frontier Airlines the whole way
- Via Dallas (DAL)Southwest Airlines the whole way
- Via Boise (BOI)Southwest Airlines, then Alaska Airlines
- Via Nashville (BNA)Southwest Airlines the whole way
- Via Austin (AUS)Southwest Airlines the whole way
- Via San Jose (SJC)Southwest Airlines the whole way
- Via Sacramento (SMF)Southwest Airlines the whole way
- Via Oakland (OAK)Southwest Airlines the whole way
- Via San Francisco (SFO)Southwest Airlines, then United Airlines and Frontier Airlines
- Via Houston (HOU)Southwest Airlines the whole way
- Via Atlanta (ATL)Delta Air Lines the whole way
MDW to ONT: common questions
Which airlines fly nonstop from MDW to ONT?
Southwest Airlines flies nonstop from Chicago (MDW) to Ontario (ONT).
How far is Chicago from Ontario by plane?
Chicago (MDW) and Ontario (ONT) are 1,703 miles (2,741 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
How many miles does MDW to ONT cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for MDW to ONT with taxes and fees.
Where can I connect between Chicago and Ontario?
The most direct connections are through Denver (DEN), Las Vegas (LAS), Phoenix (PHX), Salt Lake City (SLC) and Dallas (DFW). On 15 of them the same airline flies both flights, for example Southwest Airlines through Denver.
More routes
Routes are scheduled nonstop flights. The route data is refreshed monthly; this list was last checked November 11, 2026. Seasonal routes and new launches can be missing or end early, so confirm with the airline before you book. Distances are great-circle, the shortest path between the two airports.