Fastest€240.27
- Southwest Airlines SA683106:523h 12m10:04Ontario ONTHouston IAH
Door to door 6h 22mCO2 545.4 kgChanges 0Fixed, no changes
Ontario to Houston flight
Flights from Ontario to Houston start at €208.41 and take 6h 22m at their fastest.
The Flights from Ontario to Houston starts at €208.41 and takes 6h 22m door to door, run by 2 operators over 2,217 km, with around 5 departures a day. Fares bottom out about 30 days before departure.
- 6h 22mDoor to door
- 3h 12mMoving
- €208.41From
- 545.4 kgCO2
The cheapest and the fastest on September 28, 2026
Two journeys we can sell today, with the service number each operator files them under.
Airlines
Speed, flexibility and what is on board. Nothing here is a rating, because we have not earned one.
| Operator | From |
|---|---|
 Frontier Airlines | €181.27 |
 Southwest Airlines | €200.15 |
Houston is big enough that where you sleep decides what the days look like. We sell the seat, not the room.
Rooms within reach of Houston station
Filter by neighborhood and by nightly price, and the map tells you what is a walk and what is a cab.
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Partner links. We do not sell accommodation. We earn a commission when a booking completes, and it never changes what you pay.
When to book Ontario to Houston
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
- €234.3790 days
- €184.0360 days
- €165.9345 days
- €158.2630 days
- €200.1521 days
- €224.3414 days
- €268.007 days
- €305.763 days
- €418.341 days
- Cheapest lead time
- Fares bottom out around 30 days ahead, at €158.26.
- How much it moves
- The gap between the cheapest and most expensive lead time is 164 percent. The most expensive point is €418.34, 1 days out.
- What that means
- Today sits inside the cheap window, which closes about 30 days before departure. Waiting from here has usually cost money on this corridor rather than saved it.
Which departure day costs least
Median cheapest fare for each weekday, taken across the next three weeks of real prices.
- €224.34Sun
- €229.06Mon
- €208.41Tue
- €226.93Wed
- €267.08Thu
- €276.26Fri
- €251.68Sat
Where you leave from and where you arrive
The stations, airports and ports each mode on this corridor actually uses.
Ontario
Air
- ONT
Houston
Air
- IAH
- HOU
What the journey actually looks like
Direct or connecting, how far the route really runs, and what happens when a connection is missed.
- Direct or connecting
- 33% of the services we sell on this corridor run through without a change. The remaining 67% involve one connection.
- How far it really runs
- The route covers 2,217 km against 2,153 km in a straight line, a detour of 3 percent. Track and road geometry account for the difference.
- Where the change is
- Connections are made at Santa Ana, Albuquerque, Austin, Phoenix. The gap between arriving and leaving is 56 minutes, of which about 14 is walking.
- If the connection is missed
- The tightest connection we sell here has a 17 percent chance of not being made on the timetable alone. Part of this journey is a self transfer between separate tickets, so leave more time than the minimum and expect to check in again.
- First and last departure
- The first service of the day leaves Ontario at 06:15 and the last at 07:30, across 5 departures. The return direction keeps its own timetable, so the times back are not these times reversed.
Questions about Ontario to Houston
The questions people actually ask about this trip, answered from the same prices and times the page above is built on rather than written once and left to go stale.
How long does the Flight from Ontario to Houston take?
The Flight from Ontario to Houston takes 6h 22m door to door, of which 3h 12m is spent moving. The route runs 2,217 km. The difference between the two times is reaching the terminal and leaving it at the far end, which every time on this page includes.
How much does the Flight from Ontario to Houston cost?
The Flight from Ontario to Houston starts at €208.41 for one passenger, checked on September 13, 2026. A typical fare is €217.26. Both are the total including taxes, supplier fees and our service fee, so the price here is the price at checkout.
Who runs the Flight from Ontario to Houston?
2 operators run the Flight from Ontario to Houston: Frontier Airlines, Southwest Airlines. Between them they file around 5 departures a day. The operator table on this page compares them on fare, journey time, cruising speed, fare conditions and what is provided on board.
Which terminal does the Flight from Ontario to Houston use?
The Flight from Ontario to Houston leaves from Ontario ONT and arrives at Houston IAH. Allow about 3h 10m for reaching the departure terminal and leaving the arrival one. That time is already inside every door to door figure quoted on this page.
When should I book the Flight from Ontario to Houston?
Fares for the Flight from Ontario to Houston bottom out around 30 days ahead, at €158.26. The gap between the cheapest and most expensive lead time across the window is 164 percent, measured on September 13, 2026. Booking inside the final week has consistently cost more.
How much CO2 does the Flight from Ontario to Houston produce?
The Flight from Ontario to Houston produces about 545.4 kg of CO2 per passenger over 2217 km, which works out at roughly 246 grams per passenger kilometer. That figure is for the whole journey and for one traveler, not for the vehicle.
Where these numbers come from
Observed service A carrier record shows this named operator serving this named pair, and we carry that through unchanged.
Schedules, seat counts and fares are generated by our own model until the supplier contracts are signed. Places, coordinates, operators, which operator serves which pair, and every distance are real. We would rather say that on every page than let a modeled number pass for a filed one.
Defined in full at Door to door, Fares, The booking window, Carbon
- On this page
- Every figure above was computed for Ontario to Houston on September 13, 2026: 2217 km of route against 2153 km in a straight line, 5 services a day, 2 operators, a cheapest fare of €208.41, and 6h 22m door to door on the fastest mode. The return direction is computed separately and its numbers are not these numbers.
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