Chicago Gateway: 4 Days Out and Onward
Four days is where this itinerary stops being about day trips and starts being honest about Route 66. Days one through three repeat our 3-day itinerary exactly; day four is a reality check on what “doing Route 66 from Chicago” actually means. This same spine extends into our 5-day through 7-day versions.
Book these before you go
- Milwaukee day trip from Chicago : book the morning slot before summer Saturdays fill up.
- Milwaukee brewery and lakefront tour : worth locking in if a guided afternoon beats wandering solo.
- Route 66 road trip experience : a guided taste of the drive if renting a car for one afternoon isn’t worth it.
- Chicago hotel rates near Union Station : stay walkable to the station since every day here starts there.
| Day | Focus | Distance / travel time from Chicago |
|---|---|---|
| 1 | Chicago, the home base | In the city |
| 2 | Milwaukee, WI (Amtrak Hiawatha) | ~90 min one-way, $19-37 |
| 3 | Indiana Dunes National Park, IN (South Shore Line) | ~1.5-2h one-way, verify current schedule |
| 4 | Route 66’s national start (Adams St + Navy Pier) | In the city; the full drive is ~2,448 mi to Santa Monica |
Day 1: Chicago, the home base
If you’re flying in, the Blue Line is the only O’Hare rail line running all 24 hours, about 45 minutes to the Loop for $2.75 tapped on a Ventra card or contactless payment. If you’re arriving off one of Union Station’s own long-haul trains, you’re already downtown, no transfer needed. Our Chicago guide covers Millennium Park, the river cruise and the rest of downtown in the depth it deserves; day one here is about getting oriented. Walk the free Riverwalk toward Union Station in the evening and get a look at the building the rest of this trip runs through.
Day 2: Milwaukee, the one honest day trip
Catch a morning Amtrak Hiawatha from Union Station; the ride to Milwaukee runs about 90 minutes, with 7 weekday and Saturday round trips a day (6 on Sunday) and fares of $19-37 one-way depending on demand. The train stops at Glenview, Sturtevant and General Mitchell Airport along the way. Spend the day at the Harley-Davidson Museum, the Milwaukee Art Museum’s lakefront wing, or wandering the Milwaukee Public Market, then catch an evening train back before dinner in Chicago. Confirm current departure times at visitmilwaukee.org before you lock in a return train.
Day 3: Indiana Dunes National Park, if the trains cooperate
The South Shore Line runs direct from Millennium Station through roughly 20 stops, Hammond, Gary and East Chicago among them, to the dunes. A June 24, 2026 freight derailment near East Chicago forced a weekend-and-holiday-only schedule for several weeks; full weekday service resumed July 9, 2026, but confirm the current timetable at mysouthshoreline.com before you build a day around a specific departure. Once there, Mount Baldy’s shifting dune and the Lake Michigan beaches are the payoff; check current entrance fees and trail closures at nps.gov/indu first.
Day 4: Route 66’s national start, not a day trip in disguise
Route 66’s original “Begin” sign has stood at Adams Street and Michigan Avenue, across from the Art Institute, since roughly 1955, and it hasn’t moved. For the road’s 2026 centennial, the city added a second, ceremonial starting point at Navy Pier, dedicated March 25, 2026, framing a “pier-to-pier” run toward Santa Monica Pier; the Navy Pier start adds to the original sign rather than replacing it. The actual drive runs roughly 2,448 miles across 8 states, and a driver who wants to see the road properly budgets 10 to 14 days, not a week. If you want a taste without that commitment, a rental car and a single afternoon on the original alignment just outside the city is honest about what it is: a preview, not the trip.
Do you need a car for this trip?
Only for one afternoon. Days one through three run entirely on the CTA, the Amtrak Hiawatha and the South Shore Line; day four’s Route 66 preview is the only part of this trip that benefits from a rental, and only for a few hours.
Getting around this itinerary
CTA rail is $2.75 and bus is $2.50 since the February 2026 fare update (see transitchicago.com for current fares); tap a Ventra card or a contactless bank card directly at the turnstile. For a longer version that adds Union Station’s own long-haul network and a Milwaukee overnight, see our 5-day through 7-day versions. For day trips that stay inside Illinois, see our Chicago, Illinois guide instead.
Concrete tip: don’t book more than a half-day rental for the Route 66 preview. Anyone selling you a full day of driving on four days total hasn’t done the math on how far 2,448 miles actually is.