Udon–Nong Khai in 3 Days
Mekong Riverside, Across to Vientiane

🔄 Updated 21 Jun 2026

If you're coming all the way to Isan, doing Udon and Nong Khai in one trip is better value than two separate visits, because the two towns are only about 55 kilometres apart — an hour's drive. On top of that, Nong Khai is the gateway across to Vientiane, the Lao capital, which sits just over 20 kilometres from the Friendship Bridge. So we've laid this out as 3 days, 2 nights: Udon on day one, a first night over in riverside Nong Khai, and day three a there-and-back day trip across to Vientiane.

This plan is written assuming you have a car (your own or a rental) — that's the smoothest way. But you can do it without one too. There are frequent vans and trains between Udon and Nong Khai, and to cross over to Vientiane you can take the shuttle bus across the bridge or the Thai–Lao train. We'll cover all of it below. The one thing you must prepare is your actual passport if you want to enter Vientiane city.

Day 1 — Udon Thani, take the city easy

Day one stays in Udon all day, no rush to move on. Start with a Vietnamese breakfast, which is one of the town's signatures. Hit the in-town spots through midday, then end at Nong Prajak Park when the sun softens. You'll still sleep in Udon tonight so you're well rested before shifting to Nong Khai tomorrow morning.

Day 2 — shift to Nong Khai, the Mekong riverside

On the morning of day two you move from Udon to Nong Khai, a 55-kilometre run. Drive the Mittraphap road and you're there in an hour. No car? Udon–Nong Khai vans leave frequently from Udon's bus terminal for around 50–60 THB, or take the train — line 147 (Udon Thani–Kham Sawat) stops at Nong Khai along the way. Today you cover the Nong Khai side fully: the merit-making route, the quirky stuff, and the Mekong in the evening.

Day 3 — cross the Friendship Bridge to Vientiane

The highlight of this trip is the last day: crossing the Mekong to Vientiane as a there-and-back day trip. The Lao capital is just over 20 kilometres from the Friendship Bridge, so even half a day lets you cover the main landmarks — Pha That Luang, Patuxai, Haw Phra Kaew and the morning market. Then come back to sleep on the Thai side or travel on in the evening.

On documents: Thai nationals can enter Laos on a passport with no visa needed. If you don't have a passport, you can get a temporary border pass at the Nong Khai provincial hall — the fee is around 40 THB — but it only lets you stay within Vientiane Capital for no more than 3 days, 2 nights. On crossing day, carry your passport and allow extra time, as the checkpoint is busy in the morning.

Food you shouldn't miss on this trip

This route eats well, because you get Udon-style Vietnamese food, Nong Khai's riverside cooking and Lao food on the Vientiane side, all in one trip. Here's what to make sure you fit into the three days.

Where to stay, getting around, and budget

This trip sleeps in two towns — Udon the first night, riverside Nong Khai the second. Position yourself well and you can walk around without driving at night. Money-wise it's lighter than a beach trip, but set aside a little extra for border-crossing costs and transport in Vientiane.

• Staying in Udon — choose the area around Nong Prajak or near UD Town so you can walk to food and sights. Mid-range hotels run 600–1,200 THB a night.
• Staying in Nong Khai — go riverside near Tha Sadet Market, with options from guesthouses to river-view hotels, 500–1,500 THB a night, and you wake up looking at the Mekong.
• Udon–Nong Khai — 55 km, an hour by car, or a van/train for around 50–60 THB per leg, leaving frequently all day.
• Crossing to Vientiane — the shuttle bus over the bridge is around 30 THB plus a small Laos entry fee. Thai nationals use a passport with no visa, or get a temporary border pass at the provincial hall for around 40 THB.
• Per-person budget for 3 days — 2 nights' lodging split two ways is about 1,000–1,500 THB, food for the whole trip ~1,000–1,400 THB, border crossing + transport in Vientiane ~300–500 THB, Sala Kaew Ku entry ~40 THB. Roughly 2,500–3,800 THB per person (not counting fuel/intercity transport).

Adjust the plan to the time you have

If you don't have a full 3 days, or want to add more spots, you can tweak it several ways. Choose based on your interests and how many days you've got.