Route guide · 1,301 miles
Cheap Flights from San Diego to Houston
SAN → IAH · Nonstop 3h 9m · Live round-trip fares
Looking for cheap flights from San Diego to Houston? You're in the right place. Airfare Deal tracks live fares on this 1,301-mile route around the clock. As a rule of thumb, booking 3–6 weeks ahead lands the best prices — and a free fare alert means you never have to keep refreshing the page.
Live fares for SAN → IAH are updating. Use the search below for real-time prices.
Search live pricesCheapest recent fare
See live fares
Updated daily
Flight time
3h 9m
Nonstop, typical
Distance
1,301 mi
SAN → IAH
Book ahead
3–6 weeks
Best window, typically
Nonstop airlines
1
United Airlines
Nonstop flights from San Diego to Houston
Nonstop service links San Diego and Houston directly — flights are flown by United Airlines. Expect roughly 3h 9m in the air. If a nonstop is what you want, don't wait too long: booking 3–6 weeks ahead is when these seats are priced most kindly.
Booking insights: San Diego → Houston
- Distance: 1,301 miles · nonstop flight time: 3h 9m.
- Cheapest upcoming week in the live data starts around Oct 22, with fares from $227.
- Rule of thumb for this route: the sweet spot is usually 3–6 weeks before departure.
- If your dates flex by a day or two, shifting to a midweek departure is the easiest saving there is.
- Set a free Airfare Deal alert instead of checking daily — the best fares can sell out in hours.
Cheapest month · San Diego → Houston
October 2026
Every date's recent round-trip fare, at a glance.
Fares from
$227
Cheapest: Thu, Oct 22 — $227
Get this fare →Recent fares found for specific dates in October 2026. Blank days had no recent fare in our data — ask our team and we'll check them for you.
Free fare alerts
Watch San Diego (SAN) → Houston (IAH)
We check this route's fares daily. The moment the price drops, we'll email you — free, unsubscribe anytime.
Talk to a real person
Get San Diego → Houston flights confirmed by phone
Fares move fast. Call us and we'll confirm the latest price for your dates — or drop your number and we'll call you back. Free, no payment taken on the call.
Request a callback
Flying from San Diego to Houston: what you need to know
The flight
San Diego to Houston is a proper cross-country leg — 1,301 miles and around 3h 9m in the air nonstop. Download entertainment before you board, bring a full water bottle, and think about the time change: even a two-hour shift can leave you groggy if you land late and start early.
Airlines on this route
United Airlines flies this route nonstop. That matters more than it sounds: the cheapest fare on one carrier is rarely the same product as the cheapest on another. Checked-bag fees, free seat selection and change rules all differ, so compare the full trip cost before you pick a winner. See our airline guides for exactly what each carrier charges — then send an enquiry and we'll confirm the all-in price for your dates.
Leaving from San Diego (SAN)
Plan to be at the airport two hours before a domestic departure — ninety minutes can work at smaller airports outside peak times, but security lines are the one variable you can't control. If you're checking a bag, add time rather than cutting it close. Our San Diego airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in Houston (IAH)
Before you land, know how you're getting from the airport to where you're staying — it's the part of the trip people forget to plan. The Houston airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check Houston to San Diego fares — prices on the return direction often move on a different rhythm.
When to book
For a trip of 1,301 miles, booking 3–6 weeks ahead typically lands you in the sweet spot. Leave it to the final two weeks and prices usually climb as the cheapest seats sell out. If your dates are flexible, midweek departures are where the lower fares hide on most domestic routes.
Good to know before you go
- Basic economy fares often exclude checked bags and seat selection. Price the whole trip, not the headline fare.
- Get to the airport two hours before departure; security, not the flight, is the part that runs late.
- If you're traveling with only a carry-on, you can skip the bag-drop line entirely with mobile check-in.
- Download the airline's app before you fly; gate changes and delays show up there first.
- Nonstop time on this route is about 3h 9m — a one-stop itinerary needs to be a lot cheaper to be worth the extra hours.
San Diego to Houston flight FAQs
How long is the flight from SAN to IAH?
Plan on about 3h 9m in the air for a nonstop from San Diego to Houston — the route runs roughly 1,301 miles. Connecting flights typically add 2–4 hours.
Are there nonstop flights from San Diego to Houston?
Yes — look for United Airlines on this route. Nonstop seats are usually priced best 3–6 weeks before departure.
What is the cheapest month to fly from San Diego to Houston?
Fares from San Diego to Houston tend to ease outside the peak summer and holiday rush — the late-summer and early-fall shoulder weeks are usually kinder on the wallet. Set a free Airfare Deal alert and we'll flag the dips for your dates.
How much are last minute flights from SAN to IAH?
Book inside the final week and you'll usually pay a premium on SAN to IAH. Fares booked 3–6 weeks ahead are almost always kinder.
What is a good round-trip deal from San Diego to Houston?
A good deal is anything at or below the recent fares shown above. Set a free Airfare Deal alert and we'll ping you the moment fares drop.
Which airlines fly from San Diego to Houston?
The main carriers on this route are United Airlines. Comparing all of them on the live search below usually surfaces the lowest fare for your dates.
How early should I get to San Diego airport for this flight?
Plan on two hours before departure for a domestic flight — ninety minutes can work at smaller airports outside peak times. If you're checking a bag, earlier is better; the bag-drop line, not the flight, is what runs late.
Do the cheapest fares on this route include a checked bag?
Usually not. Basic economy fares on most airlines include a carry-on but charge extra for checked bags, and seat selection can cost more too. Add up the real total before comparing — a slightly higher regular fare sometimes works out cheaper. Our team confirms the full breakdown with you before you pay.
More cheap flights from San Diego
How Airfare Deal works — Airfare Deal is a free fare-search and enquiry service. We take no payment online; send an enquiry and our travel team confirms your fare before you pay anything.