Route reliability record
OMA→LAS
Omaha to Las Vegas
- Flights
- 1,132
- Period
- September 2025 to August 2026
- Distance
- 1,099 mi
- Carriers
- 2
This route lands a B+, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 1,132 OMA to LAS flights, with a median arrival 7 minutes early.
Best time to fly OMA to LAS: a 5am–8am departure, ideally on a Sunday. Flights in that window arrived on time 93.9% of the time and Sunday flights 84.6%, against 82.0% for the route overall.
Set against the rest of the country, this route's record is 5 points better than the US average of 77.3%. That gap is worth roughly 47 fewer late arrivals for every thousand flights.
Key figures
On time
82.0%
Arrivals under 15 minutes late, of 1,125 completed flights
Avg delay
72 min
Across delayed arrivals only, not all flights
Cancelled
0.53%
National rate is 1.89%
Best carrier
Southwest
81.8% on time across 1,034 flights
These figures cover 1,132 flights between September 2025 and August 2026. The median arrival is 7 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
Which airline is most reliable on OMA to LAS
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Allegiant Airthin sample | 98 | 83.7% | 112 min | 0.00% | B+ |
| Southwest Airlines | 1,034 | 81.8% | 68 min | 0.58% | B+ |
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Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 31 points, against half a point between the best and worst carrier.
- 5am–8am349 flights93.9%
- 8am–11am17 flights—
- 11am–2pm336 flights83.6%
- 2pm–5pm128 flights78.1%
- 5pm–8pm137 flights72.8%
- 8pm–5am165 flights63.0%
Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 63.0% on time, against 93.9% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5am–8am window is the busiest, with 349 flights scheduled in it.
Explore
Filter OMA to LAS by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On OMA to LAS, the best departure window is 5am–8am at 93.9% on time and the worst is 8pm–5am at 63.0%, a wide gap of 30.9 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am93.9%
- 8–11am—
- 11am–2pm83.6%
- 2–5pm78.1%
- 5–8pm72.8%
- 8pm–5am63.0%
best all US flightsScale 55% to 100%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 20 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
June is the worst month at 68.4% on time, 20 points below December, the best at 88.7%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. March was the busiest month here, with 102 flights.
Across the week, Sunday is the strongest day at 84.6% on time and Thursday the weakest at 76.9%, a spread of 8 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 56% of the 15,000 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Late-arriving aircraft
- 23%Carrier
- 18%National Airspace System
- 4%Extreme weather
56% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 15,000 reported delay minutes here, that single category outweighs weather by 15 to one. The split is drawn from 14,565 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 93.9% on time here.
Cancellations are rare at 0.53%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here actually costs
6.8% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
The 1,099 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 75.6% on time across 1,132 flights, 6 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 6 points of difference.
The sample behind these figures is 1,132 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in LAS after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. December runs 88.7% on time and June 68.4%, a swing of 20 points. If the dates move at all, move them out of June before you think about anything else. 1,125 completed flights over 12 months sit behind that.
Common questions
OMA to LAS questions
How often is OMA to LAS delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 18.0% of the 1,132 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
How reliable is OMA to LAS compared with the rest of the country?
82.0% of flights arrive on time here against a national 77.3%, a difference of 5 points in its favour. That is worth a B+ on this site's grading scale.
What time of day has the fewest delays on OMA to LAS?
The 5am–8am departure window is the strongest at 93.9% on time. The 8pm–5am window is the weakest at 63.0%, 31 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are June delays on OMA to LAS?
June is the weakest month at 68.4% on time, compared with 88.7% in December. Across the year that is 20 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- LAS to OMA — the return legseparate record
- Eppley Airfield (OMA) delay statistics
- Harry Reid International (LAS) delay statistics
- OMA to DEN, a related route75.8%
- LAX to LAS, a related route75.8%
- OMA to ORD, a related route74.2%
- Allegiant Air on-time record83.7%
- Southwest Airlines on-time record81.8%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. OMA to LAS and LAS to OMA are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.