Cheap Flights from St Louis to Denver
No deal from St Louis to Denver has cleared our price bar yet. What we have seen on the route is below.
Across 4 months of observations from St Louis to Denver, the lowest round-trip fare we recorded was $68, in August. The typical fare was $191. August was the cheapest month we saw and July the dearest.
The most recent price we saw on this route was $74 on Frontier, seen Oct 16. It is an unverified observation and may have changed.
See every deal <a href="/from/st-louis">from St Louis</a>, <a href="/to/denver">to Denver</a>, or the return direction <a href="/from/denver/to/st-louis">Denver to St Louis</a>.
Latest price we saw: St Louis to Denver
The most recent round-trip fare our sweep found on this route. It is not verified and may have changed since the date shown.
| From | Price | Per mile | Travel dates | Airline | Seen | Check price |
|---|---|---|---|---|---|---|
| St Louis (STL) to Denver (DEN) | $74 | 4.8¢ | Nov 7 – Nov 13 | Frontier | Oct 16 | Check price |
Price history: St Louis to Denver
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $74 | $304 | 96 |
| Sep 2026 | $88 | $181 | 129 |
| Aug 2026 | $68 | $154 | 127 |
| Jul 2026 | $124 | $124 | 1 |
Frequently asked questions
How many flight deals from St Louis to Denver are on Sparkflights right now?
There are 0 verified deals from St Louis to Denver on the board right now. The list refreshes hourly.
What is the lowest price ever seen from St Louis to Denver?
The lowest fare we've recorded from St Louis to Denver is $68, based on 353 price observations over 4 months.
How much does a flight from St Louis to Denver cost?
The typical round-trip fare we observed from St Louis to Denver is $191, against a recorded low of $68. These are observations, not quotes.
When is the cheapest month to fly St Louis to Denver?
August was the cheapest month we observed from St Louis to Denver and July the dearest, over 4 months of data.
What is the current price from St Louis to Denver?
The most recent fare our sweep saw from St Louis to Denver is $74, on Oct 16. It is an unverified observation rather than a verified deal, so check it before booking.