Ontario · security and when to leave
ONT TSA wait times by hour
TSA screens about 10,900 people a day at Ontario International Airport. Its own hour-by-hour counts for Sep 6 to Oct 24, 2026 show when the lines build, and the calculator below turns that into the time to leave home.
Updated Oct 31, 2026By Steven MoHow we check Report a correction
Allow up to 30 min, 10 with PreCheck. About 1,200 people an hour
Allow about 15 min, 5 with PreCheck. About 260 people an hour
At the busiest time; 1 h 15 min when it's quieter
TSA's counts, Sep 6 to Oct 24, 2026
Quick answer
Allow up to 30 minutes for security at ONT at its busiest (5–6 AM) and about 15 in the 6–8 PM lull, or 10 and 5 with PreCheck. TSA doesn't publish wait times by airport, so these are planning allowances from its hourly counts of people screened, not live waits. Get to ONT about 1 h 30 min before a domestic flight around 6:30 AM, or 1 h 15 min before one around 7:30 PM, with just a carry-on. Add about 20 minutes to check a bag, and allow 2 h 20 min for an international flight.
- Busiest hours
- 5–6 AM
- Quietest daytime hours
- 6–8 PM
- Busiest day
- Monday (quietest: Saturday)
- When it's open
- Screening at ONT picks up around 3 AM, lines build from about 4 AM and it winds down after 12 AM.
- Busiest checkpoint
- T4, 53% of travelers
- Data
- TSA's counts of people screened, Sep 6 to Oct 24, 2026
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When should I leave for ONT?
- 6:05 AM Drive to the airportincludes 5 min for traffic or delays35 min
- 6:40 AM Get dropped off at the terminal5 min
- 6:45 AM Security20 min
- 7:05 AM Walk to your gate10 min
- 7:15 AM Spare time for surprises15 min
- 7:30 AM At the gate when boarding starts30 min
Security at that time: moderate in TSA's counts for an average day, so we allow 20 min. That's a planning allowance, not a live wait. How we calculate this
ONT security wait times by hour
People screened per hour across ONT's checkpoints, averaged over 7 weeks of TSA data (Sep 6 to Oct 24, 2026), and how long to allow for security in each hour. More people means longer lines, though TSA staffs up for the peaks, so read it as when lines build rather than exact waits.
- Quiet
- Moderate
- Busy
- Busiest
Wait times to allow, hour by hour
| Hour | People | Standard | PreCheck |
|---|---|---|---|
| 12 AM–1 AM | 3 | – | – |
| 1 AM–2 AM | 0 | – | – |
| 2 AM–3 AM | 0 | – | – |
| 3 AM–4 AM | 222 | 15 min | 5 min |
| 4 AM–5 AM | 950 | 25 min | 10 min |
| 5 AM–6 AM | 1,237 | 30 min | 10 min |
| 6 AM–7 AM | 739 | 20 min | 5 min |
| 7 AM–8 AM | 546 | 20 min | 5 min |
| 8 AM–9 AM | 565 | 20 min | 5 min |
| 9 AM–10 AM | 701 | 20 min | 5 min |
| 10 AM–11 AM | 773 | 20 min | 5 min |
| 11 AM–12 PM | 751 | 20 min | 5 min |
| 12 PM–1 PM | 639 | 20 min | 5 min |
| 1 PM–2 PM | 477 | 20 min | 5 min |
| 2 PM–3 PM | 342 | 15 min | 5 min |
| 3 PM–4 PM | 411 | 15 min | 5 min |
| 4 PM–5 PM | 368 | 15 min | 5 min |
| 5 PM–6 PM | 306 | 15 min | 5 min |
| 6 PM–7 PM | 243 | 15 min | 5 min |
| 7 PM–8 PM | 266 | 15 min | 5 min |
| 8 PM–9 PM | 360 | 15 min | 5 min |
| 9 PM–10 PM | 428 | 15 min | 5 min |
| 10 PM–11 PM | 429 | 15 min | 5 min |
| 11 PM–12 AM | 111 | 15 min | 5 min |
Minutes are what we'd allow at that hour's level of traffic: planning allowances, not measured or live waits.
Security at ONT is busiest 5–6 AM, when about 1,200 people go through every hour: 4.9 times as many as in the 6–8 PM lull.
Monday is the busiest day (about 12,100 people) and Saturday the quietest (about 9,400). Screening at ONT picks up around 3 AM, lines build from about 4 AM and it winds down after 12 AM.
TSA reports its lines against 30 minutes: on the busy Fourth of July weekend in 2021, 99.7% of travelers in standard lanes waited less than that. So at ONT's busiest hours we plan for 30 minutes in the standard lane and 10 with PreCheck, and less when it's quieter.
These aren't live waits. For today's line, check Ontario International Airport's official site: many airports post live checkpoint waits.
How early to get to ONT
How long before departure to reach the airport if you're dropped off at the terminal. Flights around 6:30 AM hit security in its busiest hour; flights around 7:30 PM in a quieter stretch.
| Your trip | Flights around 6:30 AM | Around 7:30 PM |
|---|---|---|
| Domestic, carry-on only | 1 h 30 min | 1 h 15 min |
| Domestic, checking a bag | 1 h 50 min | 1 h 25 min |
| Domestic, carry-on, PreCheck or CLEAR | 1 h 10 min | 1 h 5 min |
| International, checking a bag | 2 h 20 min | 2 h |
Parking adds 15 to 25 minutes and returning a rental car about 30; the calculator above adds them for you. Most U.S. airlines close bag drop 45 minutes before domestic departures and 60 before international ones, and on holiday weekends we'd allow another 15 to 25 minutes. How we work these out
ONT security checkpoints
ONT has 2 main checkpoints in TSA's data. T4 screens 53% of departing travelers.
| Checkpoint (TSA's name) | Share of travelers | Busy from |
|---|---|---|
| T4 | 53% | 3 AM |
| T2 | 47% | 3 AM |
Terminals: Terminals 2 and 4, plus an international arrivals facility. Two terminals, 2 and 4, each with its own checkpoint; arrivals from abroad use a separate international facility.
Checkpoint names are TSA's own. Use the checkpoint for your terminal or concourse; at many airports any checkpoint reaches every gate, but not at all of them.
Getting through ONT security faster
- Fly Saturday, or at a time that reaches security in the 6–8 PM lull, if you can: ONT's checkpoints see about 260 people an hour then, against 1,200 at the peak.
- TSA PreCheck or CLEAR: in TSA's 2021 holiday-weekend figures 99% of PreCheck travelers waited under 5 minutes. In our plan it saves about 20 minutes at ONT's busiest hours.
- Checking a bag? The bag drop lines peak at the same hours as security, so add about 20 minutes then, and get there before your airline closes bag drop (usually 45 minutes before a domestic flight).
- On the first flights of the day, expect a line as soon as screening starts: lines at ONT build from about 4 AM.
- ONT is about 38 miles east of downtown Los Angeles; it's the Inland Empire's airport.
ONT TSA wait times FAQ
About 1 h 30 min before departure with just a carry-on if your flight leaves around 6:30 AM, when security at ONT is busiest, or 1 h 15 min around 7:30 PM. Checking a bag, allow 1 h 50 min at the busiest times. That's for being dropped off at the terminal; add 15 to 25 minutes to park.
More for ONT
TSA wait times nearby: Los Angeles (LAX) · San Francisco (SFO) · San Diego (SAN) · Sacramento (SMF) · Orange County (SNA) · San Jose (SJC)
Sources
Updated Oct 31, 2026 with TSA's counts for Sep 6 to Oct 24, 2026. TSA publishes these counts weekly with a delay of about a week, and staffing changes day to day, so check your airport's live wait before you leave.
- TSA FOIA reading room: TSA throughput data, people screened at every checkpoint, hour by hour (7 weekly files, Sep 6 to Oct 24, 2026)
- TSA throughput data, latest week used (to Oct 24, 2026)
- TSA: 99.7% of standard-lane travelers waited less than 30 minutes and 99% of PreCheck travelers less than 5 over the Fourth of July weekend (2021)
- Ontario International Airport official website
- Wikipedia: Ontario International Airport (airlines, terminals and ground transportation)
Read how we collect and check this data, or tell us if something's out of date.
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