Take the RegioJet train from Brno hlavní nádraží around 7:00–7:30 AM; the journey to Wien Hauptbahnhof usually takes about 1.5–2 hours. Keep your passport or ID and ticket handy for the international journey, and allow a little time at Brno station to find the platform. From Wien Hauptbahnhof, take the U1 toward Leopoldau to Stephansplatz—about 10 minutes—or walk in roughly 25 minutes if you want an initial glimpse of the central streets. Start at St. Stephen’s Cathedral, where the nave is generally open from morning until early evening, with services occasionally affecting access. Entry to the main cathedral is typically free, while the South Tower climb costs roughly €7–8; the 300-plus steps are worth it for the roof and city views if your luggage and energy allow.
Walk west along Graben and Kohlmarkt to Café Central on Herrengasse for coffee and a light lunch. This famous literary café is beautiful but popular, so expect a queue—arriving before noon helps. Allow around €12–25 for coffee, cake, or a light meal, and treat it as a relaxed stop rather than a quick takeaway. Afterward, continue to Michaelerplatz and the exterior of the Hofburg Imperial Palace. Take your time through the ceremonial courtyards and look down toward the excavated Roman remains at Michaelerplatz; this compact area is easy to explore on foot and feels comfortable for a solo traveler in daylight.
From Hofburg, cross the Ringstrasse toward Maria-Theresien-Platz and spend about two focused hours at the Kunsthistorisches Museum. Its grand staircase and interior are almost as impressive as the collection, particularly the Bruegel and Old Master rooms. Check the museum’s official site before leaving Brno for the exact September hours; it is commonly open Tuesday–Sunday from around 10:00 AM, with admission roughly €21–22. Finish by walking along Opernring to the Vienna State Opera, about 10–15 minutes away. Admire the exterior and nearby Ringstrasse buildings, or attend a performance if you have booked ahead; standing-room tickets can sometimes be available on the day, but do not rely on them for a fixed evening plan. For a simple return, take the U1 from Karlsplatz back to Wien Hauptbahnhof; Vienna’s central streets are generally busy and well-lit, though keep your usual awareness around stations and crowded trains.
Start at Belvedere Palace in Landstraße around 9:00 AM, before the galleries become crowded. Make the Upper Belvedere your priority for Klimt’s The Kiss, then take your time in the palace rooms and the formal Baroque gardens, with their long views toward central Vienna. Allow roughly 2½ hours. Timed-entry tickets are advisable; the museum generally opens at 9:00 AM, but check the official schedule for your date. From Wien Hauptbahnhof, it is a short walk or one tram stop to the palace, and the quietest garden entrance is usually the side near Rennweg.
Continue by tram or U-Bahn toward Karlskirche at Karlsplatz—about 15–20 minutes, depending on connections. Spend around 45 minutes inside this dramatic Baroque church, especially beneath the oval dome; the interior viewing lift is a worthwhile extra if operating. Entry is usually around €9–10, and modest clothing is expected. Rather than rushing onward, take a few minutes to sit around the reflecting pool outside and admire the church from the square.
Walk approximately 10 minutes from Karlskirche to Naschmarkt for an easy lunch and a little browsing. The market is liveliest around midday, with food stalls ranging from Viennese specialties to Middle Eastern, Balkan, and Asian dishes; budget €10–20. After lunch, take the U4 from Kettenbrückengasse to Schönbrunn, allowing about 25 minutes including the walk. Reserve a timed palace tour in advance and plan roughly three hours for the imperial rooms, courtyards, and gardens. The gardens are extensive, so wear comfortable shoes and consider walking up toward the Gloriette for the best perspective over the grounds. Palace and garden hours vary seasonally, but afternoon admission is normally available until around 5:00 PM, with the gardens staying open later—verify the September closing times before setting out.
Finish at Heuriger Wolff in Neustift am Walde, a more residential and relaxed part of Vienna. From Schönbrunn, allow about 40–50 minutes by U-Bahn, tram, and bus; check the live Wiener Linien connection because the final approach can be slower. Order a traditional Heuriger plate, seasonal salads, and a glass of local wine for approximately €20–35. It is a pleasant place for a solo dinner, especially while it is still light, but check opening days and reserve if possible. For the return, use the well-lit main streets and public transport rather than walking between the wine taverns; Vienna is generally safe, though the usual station and late-evening awareness is sensible.
After arriving at Praha hlavní nádraží around 11:00–11:30 AM, take Metro line C one stop to Muzeum, then change to line A for Staroměstská, or walk for roughly 20 minutes if you want your first look at the city. Head straight to Old Town Square and spend about an hour taking in the Gothic silhouette of the Church of Our Lady before Týn, the historic façades, and the Old Town Hall Astronomical Clock. The square is busiest around midday, so keep your phone and wallet secure in the crowd; the surrounding streets are generally easy to explore alone on foot.
Walk about 10 minutes along Dlouhá to Lokál Dlouhá, a lively Czech beer hall with fast service, tank beer, and unfussy dishes such as schnitzel, goulash, or fried cheese. Plan on roughly €12–25, and expect a busy room at lunchtime—joining a shared table is normal. After lunch, continue toward the river through Josefov and the lanes around Křižovnická, rather than taking a taxi; it is a pleasant, compact walk of about 15 minutes.
Cross Charles Bridge early in the afternoon, allowing around 45 minutes for the statues, river views, and a few pauses at the Malá Strana end. It can be crowded, but the atmosphere is best when you walk slowly and look back toward the Old Town towers. From there, take tram 22 or 23 from Malostranské náměstí up to Pražský hrad—a useful shortcut that saves a steep climb. Allow about 2½ hours for Prague Castle and St. Vitus Cathedral; the castle grounds are usually accessible from early morning into the evening, while interior circuits and the cathedral have more limited seasonal hours, so check the official schedule and ticket availability before going. Tickets commonly cost around €10–20 depending on the circuit. Finish at Golden Lane, whose tiny colored houses offer a compact, atmospheric glimpse of historic castle life; it is included with the relevant castle circuit and is particularly enjoyable late in the day, when the main crowds begin to thin.
Plan to leave your accommodation around 8:30 AM and make your way to Powder Tower by tram, metro, or on foot, depending on where you are staying. It is close to Praha hlavní nádraží, so you can leave luggage at the station’s paid lockers if needed; allow about 15 minutes to walk from the station. The tower usually opens around 10:00 AM, with entry roughly €5–7, but check the official schedule because hours can vary. After the steep climb, continue directly into Municipal House, where a guided interior tour is the best way to see the ornate Art Nouveau salons—tours commonly cost about €8–18 and last around an hour. For a well-placed coffee, use Kavárna Obecní dům inside the building; it is atmospheric rather than rushed, and a light breakfast or cake makes sense here.
Walk south along Na Příkopě and continue to Wenceslas Square, allowing 15–20 minutes and time to browse the arcades and side streets. Spend roughly two hours around the square and the National Museum, whose grand historic building anchors the upper end; the museum generally opens from 10:00 AM, and standard admission is often around €10–15. For lunch, Kantýna near Národní třída is a good casual Czech option if you are happy with a meat-focused menu; otherwise, pick up something simple before heading on. From the museum, take Metro line C from Muzeum to Vyšehrad—about 10 minutes—and walk uphill through the fortress grounds. At Vyšehrad, take an unhurried circuit of the ramparts, Basilica of St. Peter and St. Paul, and Vyšehrad Cemetery. The grounds are free and open into the evening; the basilica and cemetery are quieter than central Prague, but keep your visit respectful and check the basilica’s current visiting hours.
Leave Vyšehrad by about 4:15 PM so you have a comfortable margin for your train. Walk back to Vyšehrad station and take Metro line C two stops to Praha hlavní nádraží, usually 15–20 minutes including the walk through the station. Collect your luggage, buy a snack, and aim for a ČD train to Brno hlavní nádraží between 5:00 and 6:00 PM; the journey generally takes 2½–3 hours. Book ahead through the ČD website or app, especially for a Friday evening, and verify the platform on the departure boards rather than relying on the ticket. Keep your belongings close around the station and on the train, then expect to arrive in Brno later in the evening.