Cheapest€263.28
- Frontier Airlines FA999017:344h 58m22:32Chicago MDWSan Juan SJU
Door to door 8h 8mCO2 503.6 kgChanges 0Fixed, no changes
Chicago to San Juan flight
Flights from Chicago to San Juan start at €316.97 and take 7h 57m at their fastest.
The Flights from Chicago to San Juan starts at €316.97 and takes 7h 57m door to door, run by 3 operators over 3,403 km, with around 13 departures a day. Fares bottom out about 30 days before departure.
- 7h 57mDoor to door
- 4h 47mMoving
- €316.97From
- 503.6 kgCO2
The cheapest and the fastest on September 29, 2026
Two journeys we can sell today, with the service number each operator files them under.
Fastest€298.68
- Frontier Airlines FA389106:274h 47m11:14Chicago MDWSan Juan SJU
Door to door 7h 57mCO2 503.6 kgChanges 0Fixed, no changes
Airlines
Speed, flexibility and what is on board. Nothing here is a rating, because we have not earned one.
| Operator | From | Fastest |
|---|---|---|
 American Airlines | €276.26 | 7h 51m |
 Frontier Airlines | €263.28 | 7h 51m |
| United Airlines | €286.88 | 7h 53m |
The trip ends at San Juan Railroad Terminal. Everything past the gates belongs to somebody else, the rooms included.
A room in San Juan for the night the flight gets in
Sort by distance from San Juan Railroad Terminal and you can see which places are ten minutes on foot and which are not.
Search San Juan on Booking.com
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When to book Chicago to San Juan
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
- €341.1690 days
- €268.0060 days
- €230.8345 days
- €223.1630 days
- €300.4521 days
- €341.1614 days
- €395.447 days
- €420.223 days
- €498.691 days
- Cheapest lead time
- Fares bottom out around 30 days ahead, at €223.16.
- How much it moves
- The gap between the cheapest and most expensive lead time is 123 percent. The most expensive point is €498.69, 1 days out.
- What that means
- Today sits inside the cheap window, which closes about 30 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.
- €341.16Sun
- €324.05Mon
- €316.97Tue
- €351.19Wed
- €455.62Thu
- €393.67Fri
- €403.11Sat
Where you leave from and where you arrive
The stations, airports and ports each mode on this corridor actually uses.
Chicago
Air
- ORD
- MDW
San Juan
Air
- SJU
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
- 69% of the services we sell on this corridor run through without a change. The remaining 31% involve one connection.
- How far it really runs
- The route covers 3,403 km against 3,304 km in a straight line, a detour of 3 percent. Track and road geometry account for the difference.
- Where the change is
- Connections are made at Raleigh, Cincinnati, Charlotte, Louisville. The gap between arriving and leaving is 45 minutes, of which about 5 is walking.
- If the connection is missed
- The tightest connection we sell here has a 20 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 Chicago at 06:18 and the last at 17:34, across 13 departures. The return direction keeps its own timetable, so the times back are not these times reversed.
Questions about Chicago to San Juan
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 Flight from Chicago to San Juan take?
The Flight from Chicago to San Juan takes 7h 57m door to door, of which 4h 47m is spent moving. The route runs 3,403 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 Flight from Chicago to San Juan cost?
The Flight from Chicago to San Juan starts at €316.97 for one passenger, checked on September 13, 2026. A typical fare is €314.61. Both are the total including taxes, supplier fees and our service fee, so the price here is the price at checkout.
Who runs the Flight from Chicago to San Juan?
3 operators run the Flight from Chicago to San Juan: American Airlines, Frontier Airlines, United Airlines. Between them they file around 13 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 Flight from Chicago to San Juan use?
The Flight from Chicago to San Juan leaves from Chicago MDW and arrives at San Juan SJU. Allow about 3h 10m 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 Flight from Chicago to San Juan?
Fares for the Flight from Chicago to San Juan bottom out around 30 days ahead, at €223.16. The gap between the cheapest and most expensive lead time across the window is 123 percent, measured on September 13, 2026. Booking inside the final week has consistently cost more.
How much CO2 does the Flight from Chicago to San Juan produce?
The Flight from Chicago to San Juan produces about 503.6 kg of CO2 per passenger over 3403 km, which works out at roughly 148 grams per passenger kilometer. That figure is for the whole journey and for one traveler, not for the vehicle.
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 Chicago to San Juan on September 13, 2026: 3403 km of route against 3304 km in a straight line, 13 services a day, 3 operators, a cheapest fare of €316.97, and 7h 57m door to door on the fastest mode. The return direction is computed separately and its numbers are not these numbers.
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Landing at SJU after the trains have stopped is the case this solves. We do not run cars.
A car waiting when you land in San Juan
Settled in advance, so the ride into San Juan costs what it said it would rather than what the cab stand says.
Book a ride from SJU with Daytrip
Partner links. We do not operate transfers. We earn a commission on a booking, and the fare is the same as going direct.