How to Find Cheap Flights to Europe (Including Error Fares)

I flew NYC to Paris for $189 roundtrip. Another time, LA to London for $220. These weren't sales — they were error fares and hidden tricks most travelers never learn. Here's the complete guide to finding cheap flights to Europe.

The Fundamentals: When to Search

Rule 1: Book 2–4 months in advance

Sweet spot for transatlantic flights: 60–120 days before departure. Prices spike within 30 days.

Rule 2: Fly mid-week

Tuesday, Wednesday, Thursday departures are cheaper. Avoid Friday, Saturday, Sunday.

Rule 3: Avoid peak season

June–August = expensive. Fly shoulder season (April–May, September–October) for 30–50% savings.

Rule 4: Be flexible with dates

Shifting your trip by 2–3 days can save $200+.

The Best Tools for Finding Cheap Flights

Google Flights:

Free, fast, best for flexible date searches. Use the calendar view to see prices across an entire month.

Skyscanner:

Great for multi-city and open-jaw tickets. Also searches budget airlines that Google Flights sometimes misses.

Kayak Explore:

Type in your home airport, leave destination blank, and see the cheapest flights worldwide. Perfect for spontaneous trips.

Scott's Cheap Flights / Going (premium, $50/year):

Email alerts for error fares, mistake fares, and flash sales. Worth the subscription if you fly internationally 2+ times/year.

Secret Flying (free):

Website and social media account posting error fares and cheap flight deals daily.

What Are Error Fares?

Error fare = a pricing mistake by the airline or booking system.

Examples:

Airlines sometimes honor these fares. Sometimes they cancel them. But if you book quickly and the ticket is issued, you often get to keep it.

How to Find Error Fares

Method 1: Follow deal aggregators

Method 2: Set Google Flights price alerts

Search a route, turn on "Track prices," and Google emails you when prices drop.

Method 3: Search odd routes manually

Error fares often appear on:

Example: I once found NYC–Reykjavik–London for $180 roundtrip because Icelandair's system mispriced the London leg.

Budget Airlines You Should Know

Norwegian Air (US ↔ Europe):

Ultra-low-cost carrier. NYC to Oslo, LA to Barcelona for $150–300 roundtrip. Catch: baggage fees, no meals, seat selection costs extra.

Play (US ↔ Iceland ↔ Europe):

Budget Icelandic airline. Fly to Reykjavik, connect to Europe. Often cheaper than direct flights.

LEVEL (US ↔ Barcelona):

Budget long-haul from Barcelona-based airline. Oakland/Boston to Barcelona for $200–400.

TAP Air Portugal (US ↔ Lisbon ↔ Europe):

Not ultra-budget, but frequently has sales. NYC to Lisbon for $300–400. Free stopover in Lisbon (explore for free on the way to your final European destination).

Advanced Tricks

1. Hidden City Ticketing

How it works:

Book a flight to a farther destination with a layover in your actual destination. Get off at the layover. Don't take the final leg.

Example:

NYC → London (direct) = $700

NYC → Oslo (via London layover) = $400

Book the Oslo ticket, get off in London, skip the Oslo leg.

Risks:

Use Skiplagged.com to find these routes.

2. Positioning Flights

If you live in an expensive departure city (like Miami or Denver), it's sometimes cheaper to fly to a cheaper gateway (like NYC or Boston) and then fly internationally from there.

Example:

Denver → Paris direct = $900

Denver → NYC = $100

NYC → Paris = $350

Total: $450 (saved $450)

3. Open-Jaw Tickets

Instead of roundtrip NYC → Paris → NYC, book:

NYC → Paris

Rome → NYC

Explore Europe overland (train, budget airlines) between Paris and Rome. Open-jaw tickets are often the same price as roundtrips.

4. Airline Miles and Points

If you have credit card points (Chase, Amex, Capital One), transfer them to airline partners and book awards.

Example routes with great value:

See our [points & miles guide](/blog?category=points-miles) for more.

Common Mistakes

Mistake 1: Booking too early

Airlines rarely release the cheapest fares more than 6 months out. Booking 10 months early ≠ cheap.

Mistake 2: Searching only your home airport

Check nearby airports. Sometimes driving 2 hours saves $300.

Mistake 3: Not clearing cookies

Some booking sites raise prices if they see you've searched the same route multiple times. Use incognito mode.

Mistake 4: Paying baggage fees at the airport

Always pre-pay online. It's 30–50% cheaper.

Mistake 5: Ignoring budget airlines

Yes, Norwegian, Ryanair, and EasyJet charge for everything. But if you pack light and bring your own snacks, you'll save hundreds.

Sample Routes & Realistic Prices (2026)

| Route | Budget Price | Normal Price |

|-------|--------------|--------------|

| NYC → London | $250–400 | $600–900 |

| LA → Paris | $300–500 | $700–1,100 |

| Chicago → Barcelona | $300–450 | $650–950 |

| Boston → Dublin | $250–350 | $600–800 |

| Miami → Lisbon | $350–500 | $700–1,000 |

These are roundtrip economy prices during shoulder season. Expect +50% in summer.

Your Action Plan

Step 1: Set up alerts

Step 2: Be flexible

If you can adjust your dates by ±3 days and fly from alternate airports, you'll save the most.

Step 3: Act fast on error fares

When you see a deal, book immediately. Error fares disappear in hours (sometimes minutes).

Step 4: Use credit cards strategically

Book with a card that has travel protections (trip cancellation, delay insurance). Chase Sapphire Preferred and Capital One Venture both offer this.

Step 5: Pack light

Avoid checked bag fees. Carry-on only = more flexibility, lower costs.

Final Thought

Cheap flights to Europe exist year-round. You just need to know where to look.

Set alerts. Be flexible. Act fast. And when you see NYC to Paris for $189, don't hesitate — book it.

Because the difference between people who "never travel because it's too expensive" and people who fly to Europe twice a year for under $400 isn't luck.

It's strategy.

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Check our [budget travel guides](/blog?category=budget-travel) for more tips on traveling Europe for less.