Flight dates in OOH are more structured than digital, but there's more flexibility than most buyers expect.
How start dates work
Digital units can start nearly any day, subject to creative approval. Static units follow posting schedules: media owners work to a five business day posting window in the start week of your campaign, provided creative was submitted on time. That window absorbs site access issues, weather, and installer routing, and it means a static unit may not go live precisely on your start date. Your contract specifies the posting period.
Are there minimum durations?
Most static inventory is sold in 4-week periods, reflecting media owner posting cycles. Digital is far more flexible; flights of a week or even days are often possible. If a vendor minimum conflicts with your window, alternatives usually exist: different units, digital substitutions, or negotiated exceptions. See the minimum duration article for details.
Aligning to events
Event-driven buys (conferences, launches, seasonal moments) are common. Digital inventory is the best tool for short, precise windows. For static presence around an event, book early; event-adjacent inventory sells out well in advance.
Can I extend a campaign mid-flight?
Often, yes, if the units are open after your end date. Extensions on performing campaigns are a common request; flag interest early so holds can be placed on the follow-on period before someone else books it.
Can I shorten or shift a booked flight?
Before contract, freely. After contract, it depends on media owner terms and how close to launch you are:
Cancellation terms typically run 60 days before launch. Some media owners work to a 30-day window instead.
Some inventory can't be cancelled at all once contracted, airport media most often. Where a unit carries a non-standard restriction, it's noted on that unit in your proposal.
Outside your vendor's stated window there is generally no cancellation fee. Inside it, terms vary by owner.
Digital flights are more adjustable than static, where production may already be committed. Your contract states the terms for each unit; check it before assuming a date is movable.
Multi-flight structures
Campaigns can run as multiple flights (bursts) with different creative, markets, or budgets per flight under one plan; a common structure for sustained programs with seasonal messaging.