Houston to Ontario (IAH–ONT) — Airlines, Schedules & Connections

IAH Airport Page →
1,331 mi airlines 18/wk
On-time Some delays Frequent delays
Flight Schedule 5 flights Verified 47m ago
Nonstop 1-Stop 2-Stop Hide separate tickets Hide overnight
  Flight Airline AC Dep Arr Dur OTP Sched  
✓
→
UA1563
UA United
739
2:13 AM
CDT TC
3:17 AM
PDT
3h 4m
—
M T W T F S S
Prices
✓
→
UA564
UA United
739
4:20 PM
CDT TC
6:07 PM
PDT
3h 47m
—
M T W T F S S
Prices
✓
→
F93131
F9 Frontier
32N
7:19 PM
CDT TA
9:04 PM
PDT
3h 45m
—
M T W T F S S
Prices
✓
←
F93132
F9 Frontier
321
8:26 AM
PDT
1:46 PM
CDT
3h 20m
—
M T W T F S S
Prices
✓
←
UA1936
UA United
739
8:30 AM
PDT T2
1:36 PM
CDT
3h 6m
—
M T W T F S S
Prices

No flights match your filters.

No nonstop flights on this route. connecting options below.

✦ 1-STOP
✧ 2-STOP Loading...
Houston to Ontario
2 carriers, 18 flights/week nonstop.
2 Airlines 18 Flights/wk 1,331 mi 3h 1m nonstop -2h behind 38 1-stop hubs

IAH–ONT is served by 2 airlines with nonstop service. United Airlines and Frontier lead the route. The flight covers 1,331 miles in approximately 3h 1m. Beyond nonstop, 38 hubs offer 1-stop connections.

Also explore IAH Routes ONT Routes IAH Live Flights ONT Live Flights IAH Delays ONT Delays
Carriers on this route

Airline Landscape

All carriers operating nonstop IAH–ONT service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
UA United Airlines 8 739 3h04-3h47 100% Star Alliance –
F9 Frontier 7 32N 3h45 100% – –
Aircraft on this route
32N Airbus A320neo – F9
739 Boeing 737-900 – UA
Alliance coverage
Star Alliance: UA (8 flights/wk, 53%)
Unaffiliated: F9 (7 flights/wk, 47%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.
Schedule

Weekly Schedule Pattern

Nonstop flight frequency by day of week, IAH to ONT direction.
Mon
2
flights
Tue
3
flights
Wed
2
flights
Thu
2
flights
Fri
2
flights
Sat
2
flights
Sun
2
flights
Departure time distribution
12 AM6 AM12 PM6 PM12 AM
Morning departures
Afternoon/evening departures
3
Nonstop flights
18
Outbound / wk
16
Return / wk
Connections

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for IAH to ONT.
1-STOP
One-Stop Connections
38
Hubs
~5h
Fastest
~41h
Longest
BUR ~5h 21m COS ~6h 7m SJC ~6h 18m DAL ~6h 35m MEM ~6h 47m
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
1,986
Candidates
Two-stop connections loaded in the connections tab above.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.
Reliability

On-Time Performance

What to expect at each end of your journey.
Outbound
IAH → ONT
100%
Generally reliable. Most flights run on time.
Departing
100%
Arriving
40%
Return
ONT → IAH
70%
Moderate delays possible. Allow buffer time.
Departing
70%
Arriving
46%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. IAH delays → ONT delays →
Alternatives

Other ways to reach Ontario from Houston

Nearby airports with service to Ontario International Airport.
Metric IAH→ONT HOU→ONT AUS→ONT
Distance from IAH – 24 mi 140 mi
Nonstop airlines 2 1 1
Weekly flights 18 14 12
Flight time 3h 1m 3h 25m 3h 5m
Departure OTP 100% – –
Houston (HOU) to Ontario flights · Austin (AUS) to Ontario flights
Airports within 200 miles of IAH with service to Ontario International Airport.
Know before you go

Travel Essentials

Practical planning for this route.
Time Difference
-2h
Ontario is 2 hours behind Houston.
IAH: CDT · ONT: PDT

When it's 6:00 PM in Houston, it's 4:00 PM in Ontario.
Distance & Flight Time
1,331 mi / 2,142 km
Nonstop flight time is approximately 3h 1m to 3h 53m.
Getting to IAH

IAH has no direct rail link to downtown Houston. The IAH Express bus runs from Houston Amtrak/Greyhound station via Park & Ride to Terminal C (60–90 min, $1.25 with METRO Q card). This is the only transit option; Houston's rail network does not reach the airport.Taxis from downtown Houston cost $50–70 and take 40–60 minutes. Ride-hails (Uber, Lyft) are typically $35–55. IAH sits 23 miles north of downtown on the North Freeway (I-45); traffic is heavy during morning and evening rush. Remote economy parking lots serve all terminals via shuttle.

Facts

IAH–ONT Quick Facts

Key statistics for the Houston to Ontario route.
Route details
Distance1,331 mi / 2,142 km
Flight time3h 1m to 3h 53m
Time difference-2 hours
Airlines (nonstop)2
Weekly flights18 out / 16 return
1-stop connections38 hubs
Origin: IAH
Full nameGeorge Bush Intercontinental Airport
IATA / ICAOIAH / KIAH
TimezoneAmerica/Indiana/Tell_City
Passengers/yr46.7M
Elevation97 ft / 30 m
Destination: ONT
Full nameOntario International Airport
IATA / ICAOONT / KONT
TimezoneAmerica/Los_Angeles
Passengers/yr7.0M
Elevation944 ft / 288 m
FAQ

Frequently Asked Questions

Common questions about IAH to ONT flights.
Nonstop flights from George Bush Intercontinental Airport to Ontario International Airport take approximately 3h 1m to 3h 53m. The route covers 1,331 miles.
2 airlines operate nonstop service: Frontier and United Airlines.
There are approximately 18 nonstop flights per week from IAH to ONT. The return direction has about 16 weekly flights.
Yes, 1-stop connections are available through BUR, COS, SJC, DAL, MEM, SDF, CVG, IND, LAL, RFD, FLL, PHL, SJD, MIA, EWR, SLC, ANC, GDL, ATL, PHX, BNA, CLT, YUL, DEN, DFW, ORD, SFO, LAS, MDW, MLM, AUS, PDX, SMF, SEA, BWI, BJX, HNL and TPE. These options provide additional schedule flexibility.
Ontario is 2 hours behind Houston.
Yes, return flights from ONT to IAH are available. Use the direction toggle at the top to view the return schedule.
Nearby alternatives include HOU and AUS. See the Alternatives section for a full comparison.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.

Flights from IAH to ONT

George Bush Intercontinental Airport (IAH) and Ontario International Airport (ONT) are connected by nonstop service from Frontier and United Airlines. With 18 weekly departures, this is a well served route.

IAH to ONT Flight Duration and Schedule

Nonstop flight time from IAH to ONT ranges from 3 hours 1 minutes to 3 hours 53 minutes. The route covers a distance of 1,331 miles (2,142 km). There are approximately 18 weekly flights outbound and 16 return, totaling 34 flights per week in both directions.

Connecting Options and Alternatives

38 one-stop connections are available, with the fastest taking approximately 5 hours via BUR. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Houston (HOU) and Austin (AUS).