Chicago to St Louis: buy now or wait?
Updated : Typical one-way fare Chicago→St Louis: €65 (median of 21 daily lowest fares we tracked); under €55 is a good price; cheapest month: January; book 28–41 days ahead.
Cheaper than 52% of what we have seen
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All fares Chicago → St Louis
Cheapest first. Every price is live and goes straight to booking.
What the history says
Based on 340 prices we recorded on this exact route, compared against the same departure month.
Best booking window
28–41 days — is when this route has been cheapest to book: €51 typical, on 33 observations. That is about €48 less than booking in the last two weeks.
Cheapest months to fly to St Louis
Booking tips from our fare data
- How far in advance should you book a flight?
- Book 1.5–2 months before departure. Tracking the same flights at every lead time (116,633 flights on 22,463 routes, 2026-06-14 to 2026-11-12), that window had the smallest average premium over each flight's lowest fare: +16.1%, against +48.8% in the last 3 days.
- Are flights getting more expensive?
- Not right now. The Piratefly monthly Fare Index stands at 98.8 in 2026-11 (month in progress), against 100 in 2026-08: comparable flights are 1.2% cheaper than then, measured on the same routes month to month.
- Are flights getting more expensive?
- Not right now. The Piratefly monthly Fare Index stands at 98.8 in 2026-11 (month in progress), against 100 in 2026-08: comparable flights are 1.2% cheaper than then, measured on the same routes month to month.
Price drops on Telegram
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