Cheapest€63.43
- Expresso Guanabara EG514706:1122h 24m04:35Terminal RodoviárioRodoviária de Assu
Door to door 23h 8mCO2 40.7 kgChanges 0Changeable for a fee
Castanhal to Açu bus
Buses from Castanhal to Açu start at €78.83 and take 23h 8m at their fastest.
The Buses from Castanhal to Açu starts at €78.83 and takes 23h 8m door to door, run by 1 operator over 1,509 km, with around 5 departures a day. Fares bottom out about 90 days before departure.
- 23h 8mDoor to door
- 22h 24mMoving
- €78.83From
- 40.7 kgCO2
The cheapest and the fastest on September 28, 2026
Two journeys we can sell today, with the service number each operator files them under.
Fastest€73.88
- Expresso Guanabara EG526607:304h 7m11:37Terminal RodoviárioMaracaçumé bus station
- Expresso Guanabara EG707912:2616h 31m04:57Maracaçumé bus stationRodoviária de Assu
Changes at Maracaçumé, with 49 minutes between services and a walk of about 5 minutes.
Door to door 22h 11mCO2 40.7 kgChanges 1Changeable for a fee
Bus operators
Speed, flexibility and what is on board. Nothing here is a rating, because we have not earned one.
| Operator | From | Fastest | Typical speed | Flexibility | On board |
|---|---|---|---|---|---|
| Expresso Guanabara | €63.43 | 20h 18m | 72 km/h | Changeable | Power outlets, Restrooms, Wi-Fi |
The bus gets you into Açu. It does not get you a bed, and neither do we.
Where to stay in Açu
Filter by neighborhood and by nightly price, and the map tells you what is a walk and what is a cab.
Partner links. We do not sell accommodation. We earn a commission when a booking completes, and it never changes what you pay.
When to book Castanhal to Açu
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
- €60.6890 days
- €71.1360 days
- €71.6845 days
- €63.9830 days
- €74.9821 days
- €87.6314 days
- €113.487 days
- €184.433 days
- €233.381 days
- Cheapest lead time
- Fares bottom out around 90 days ahead, at €60.68.
- How much it moves
- The gap between the cheapest and most expensive lead time is 285 percent. The most expensive point is €233.38, 1 days out.
- What that means
- Today sits inside the cheap window, which closes about 90 days before departure. Waiting from here has usually cost money on this corridor rather than saved it.
Which departure day costs least
Median cheapest fare for each weekday, taken across the next three weeks of real prices.
- €93.13Sun
- €78.83Mon
- €81.58Tue
- €87.63Wed
- €126.13Thu
- €117.88Fri
- €104.13Sat
Where you leave from and where you arrive
The stations, airports and ports each mode on this corridor actually uses.
Castanhal
Bus
- Terminal Rodoviário
Açu
Bus
- Rodoviária de Assu
What the journey actually looks like
Direct or connecting, how far the route really runs, and what happens when a connection is missed.
- Direct or connecting
- 20% of the services we sell on this corridor run through without a change. The remaining 80% involve one connection.
- How far it really runs
- The route covers 1,509 km against 1,312 km in a straight line, a detour of 15 percent. Track and road geometry account for the difference.
- Where the change is
- Connections are made at Maracaçumé, Tianguá, Governador Nunes Freire, Santa Luzia do Paruá. The gap between arriving and leaving is 49 minutes, of which about 5 is walking.
- If the connection is missed
- The tightest connection we sell here has a 19 percent chance of not being made on the timetable alone. Part of this journey is a self transfer between separate tickets, so leave more time than the minimum and expect to check in again.
- First and last departure
- The first service of the day leaves Castanhal at 06:11 and the last at 07:30, across 5 departures. The return direction keeps its own timetable, so the times back are not these times reversed.
Questions about Castanhal to Açu
The questions people actually ask about this trip, answered from the same prices and times the page above is built on rather than written once and left to go stale.
How long does the Coach from Castanhal to Açu take?
The Coach from Castanhal to Açu takes 23h 8m door to door, of which 22h 24m is spent moving. The route runs 1,509 km. The difference between the two times is reaching the terminal and leaving it at the far end, which every time on this page includes.
How much does the Coach from Castanhal to Açu cost?
The Coach from Castanhal to Açu starts at €78.83 for one passenger, checked on September 28, 2026. A typical fare is €73.88. Both are the total including taxes, supplier fees and our service fee, so the price here is the price at checkout.
Who runs the Coach from Castanhal to Açu?
1 operators run the Coach from Castanhal to Açu: Expresso Guanabara. Between them they file around 5 departures a day. The operator table on this page compares them on fare, journey time, cruising speed, fare conditions and what is provided on board.
Which terminal does the Coach from Castanhal to Açu use?
The Coach from Castanhal to Açu leaves from Terminal Rodoviário and arrives at Rodoviária de Assu. Allow about 44m for reaching the departure terminal and leaving the arrival one. That time is already inside every door to door figure quoted on this page.
When should I book the Coach from Castanhal to Açu?
Fares for the Coach from Castanhal to Açu bottom out around 90 days ahead, at €60.68. The gap between the cheapest and most expensive lead time across the window is 285 percent, measured on September 28, 2026. Booking inside the final week has consistently cost more.
How much CO2 does the Coach from Castanhal to Açu produce?
The Coach from Castanhal to Açu produces about 40.7 kg of CO2 per passenger over 1509 km, which works out at roughly 27 grams per passenger kilometer. That figure is for the whole journey and for one traveler, not for the vehicle.
What is provided on board the Coach from Castanhal to Açu?
Operators on the Coach from Castanhal to Açu publish Power outlets, Restrooms, Wi-Fi. That is what 1 carriers on this corridor state about their own fleets, across a journey of 23h 8m door to door. Where a carrier publishes nothing, this page lists nothing for it.
Where these numbers come from
Observed service A carrier record shows this named operator serving this named pair, and we carry that through unchanged.
Schedules, seat counts and fares are generated by our own model until the supplier contracts are signed. Places, coordinates, operators, which operator serves which pair, and every distance are real. We would rather say that on every page than let a modeled number pass for a filed one.
Defined in full at Door to door, Fares, The booking window, Carbon
- On this page
- Every figure above was computed for Castanhal to Açu on September 9, 2026: 1509 km of route against 1312 km in a straight line, 5 services a day, 1 operators, a cheapest fare of €78.83, and 23h 8m door to door on the fastest mode. The return direction is computed separately and its numbers are not these numbers.
Related journeys
The bus is the simple part. What you do once you are in Açu is somebody else's catalog.
Things to do in Açu
The tickets worth having in advance, because the line at the door is usually the whole morning.
See Açu on CivitatisOr browse GetYourGuide
Partner links. We do not sell tours or tickets. We earn a commission on a booking, and it never changes the price.