March 2026 Flight Deals: 5 Cheapest International Routes You Can Book Today

Hook:

Ever stared at a flight search page and thought, "There’s got to be a cheaper way?" In March 2026, you can actually find round‑trip tickets to five international cities for under $150 – yes, real cheap, not a typo. I’ve tracked the numbers, crunched the data, and gathered the exact dates you need to click.

Context:

Why does this matter? For budget travelers like us, the biggest expense is the flight. Snagging a sub‑$150 ticket can turn a $500‑budget trip into a $350 adventure, leaving more cash for food, experiences, and that extra night in a hostel. Plus, March is a shoulder‑season sweet spot: spring in the Northern Hemisphere, low demand, and airlines eager to fill seats.

Which International Route Is Cheapest This March?

1. Lisbon, Portugal – $138 round‑trip from JFK

When to book: Look for flights departing March 12‑18 and returning March 22‑28.
Airlines: TAP Air Portugal (direct) and Norwegian (one‑stop via Oslo).
Why it’s cheap: TAP runs a promotional “Spring Saver” fare that drops the base price to $120, and a $18 tax fee adds up to $138.
Tip: Use the Google Flights price‑tracking hack (see my post on the Google Flights hack) to get an email alert when the price dips below $140.

2. Budapest, Hungary – $144 round‑trip from BOS

When to book: Flights on March 9‑15 outbound, return March 20‑26.
Airlines: Wizz Air (one‑stop via Warsaw) and United (direct).
Why it’s cheap: Wizz Air’s “Early Bird” discount applies to bookings made at least 30 days in advance, which aligns perfectly with today’s date.
Tip: Pair this with the $3 SIM card hack (my guide on the 3 SIM card hack) to stay connected without blowing your budget.

3. Mexico City, Mexico – $149 round‑trip from LAX

When to book: Depart March 14‑20, return March 27‑April 2.
Airlines: Aeroméxico (direct) and Delta (one‑stop via Atlanta).
Why it’s cheap: Aeroméxico is running a “Spring Fiesta” fare that includes a free checked bag, saving you $30 on baggage fees.
Tip: If you have a travel credit card (see my 2026 Travel Credit Card Showdown), you can earn 2 × points on this purchase.

4. Warsaw, Poland – $152 round‑trip from ORD

When to book: Flights leaving March 10‑16, returning March 24‑30.
Airlines: LOT Polish Airlines (direct) and American Airlines (one‑stop via Philadelphia).
Why it’s cheap: LOT’s “Spring Launch” fare is limited to 50 seats per day, and the price drops when you book a Tuesday night.
Tip: Use the Google Flights price‑tracking hack again and set a price alert for $150.

5. Bangkok, Thailand – $158 round‑trip from SFO

When to book: Depart March 13‑19, return March 28‑April 3.
Airlines: Thai Airways (one‑stop via Tokyo) and United (one‑stop via Los Angeles).
Why it’s cheap: Thai Airways is clearing inventory before the high‑season rush, offering a “Spring Saver” fare that includes a complimentary meal upgrade.
Tip: Combine this with the Debit Card Hack (my post on the debit‑card hack) to avoid foreign transaction fees.

How to Lock In These Deals Right Now

Set up price alerts on Google Flights for each route.
Clear your browser cookies or use incognito mode to avoid dynamic pricing.
Book with a credit card that offers travel rewards – the 2026 Travel Credit Card Showdown outlines the best no‑annual‑fee options.
Check baggage policies – some airlines include a free bag, which can save $30‑$40.
Confirm the fare is refundable or change‑able if your plans shift (many low‑cost carriers now offer flexible tickets for a small fee).

Takeaway

Grab one of these sub‑$160 flights this March and you’ll free up at least $200‑$300 for the rest of your trip. The key is timing, alerts, and leveraging the hacks I’ve shared across the blog. Bookmark this post, set those alerts, and happy flying!

Related Reading

The Google Flights Price Tracking Hack That Saves Me $200+ Every Trip – Learn the exact steps to get real‑time alerts.
2026 Travel Credit Card Showdown: Best Cards for Budget Travelers (No Annual Fee Needed) – Pick the perfect card for earning points on these flights.
The $3 SIM Card Hack Every Budget Traveler Needs – Stay connected abroad without breaking the bank.
The Debit Card Hack That Saves Me $40 Every Trip – Avoid hidden fees on foreign purchases.